refactor/feature/fix: Major refactor of codebase

refactor(stdio): replace console/terminal command system with buffer-based stdio
- Introduced stdio.pas as the unified command I/O layer.
- All 31 command procedures across 15 files now receive stdin_buf,
  stdout_buf, and stderr_buf (POutBuf) instead of a single outbuf.
- vterminal.pas creates all three buffers per command invocation and
  displays both stdout and stderr.
- Deleted console.pas, terminal.pas, and 9 obsolete windowing programs
  (shell, splash, edit, memview, themer, netlog, vmlog, vmstate, udpcat).
- Migrated all registerCommand calls to stdio, rewrote vterminal
  processCommand to use stdio.findCommand, and added proper error
  routing to stderr for invalid params, bad paths, and system errors.

refactor(syslog): replace console logging with serial-backed syslog
- Introduced syslog.pas for kernel-level logging over serial/dev.
- Migrated all boot logging in kernel.pas from console.outputln/
  writestringln to syslog.logln/writestringln.
- Converted 19 fault handlers, hashmap, lists, scheduler, tracer, net,
  udp, and all driver init paths to use syslog.
- Rewrote BSOD in util.pas (50+ calls) from console to syslog.
- Removed CONSOLE_SLOW_REDRAW, TRGB565, TRGB565Pair, and HWND
  from system.pas.

fix(keyboard): add ring buffer and proper press/release cycling for LVGL input
- Replaced the single last_key/key_pressed slot in lvgl.pas with a
  16-entry ring buffer (kb_buf, kb_head, kb_tail) to prevent ISR
  overwrites when typing fast.
- Added a kb_pending_release flag so each keystroke gets a
  full PRESSED->RELEASED cycle before the next key is consumed —
  LVGL requires this pairing and was silently dropping intermediate
  keys when receiving consecutive PRESSED events without
  intervening releases.

feat(vterminal): use Hack monospace font for terminal output
- Added Hack Regular 14px (hack_14.c) as a custom LVGL font.
- Removed the .static_bitmap field from the generated font file
  (not present in LVGL 9.2 lv_font_t struct).
- Declared the hack_14 external symbol in lvgl.pas and switched
  vterminal's text label from lv_font_montserrat_14 to hack_14
  for proper monospace terminal rendering.

src/fault/ACE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('AC', 'Alignment Check Exception.');
-    console.writestringln('Alignment Check Exception.');
+    syslog.writestringln('Alignment Check Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/BPE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('BE', 'Breakpoint Exception.');
-    console.writestringln('Breakpoint Exception');
+    syslog.writestringln('Breakpoint Exception');
     util.halt_and_catch_fire;
 end;
 

src/fault/BTSSE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('TSS', 'Bad TSS Exception.');
-    console.writestringln('Bad TSS Exception.');
+    syslog.writestringln('Bad TSS Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/CFE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('CF', 'Coprocessor Fault Exception.');
-    console.writestringln('Coprocessor Fault Exception.');
+    syslog.writestringln('Coprocessor Fault Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/CSOE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('CSO', 'Coprocessor Seg Overrun Exception.');
-    console.writestringln('Coprocessor Seg Overrun Exception.');
+    syslog.writestringln('Coprocessor Seg Overrun Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/DBGE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('DE', 'Debug Exception');
-    console.writestringln('Debug Exception.');
+    syslog.writestringln('Debug Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/DBZ.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('DBZ', 'Divide By Zero Exception.');
-    console.writestringln('Divide by Zero Exception.');
+    syslog.writestringln('Divide by Zero Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/DFE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('DF', 'Double Fault.');
-    console.writestringln('Double Fault.');
+    syslog.writestringln('Double Fault.');
     util.halt_and_catch_fire;
 end;
 

src/fault/GPF.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -41,7 +41,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('GPF', 'General Protection Fault.');
-    console.writestringln('General Protection Fault.');
+    syslog.writestringln('General Protection Fault.');
     util.halt_and_catch_fire;
 end;
 

src/fault/IDOE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('IDO', 'Into Detected Overflow Exception.');
-    console.writestringln('IDO Exception.');
+    syslog.writestringln('IDO Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/IOPE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('IO', 'Invalid OPCode Exception.');
-    console.writestringln('Invalid OPCode Exception.');
+    syslog.writestringln('Invalid OPCode Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/MCE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('MC', 'Machine Check Exception.');
-    console.writestringln('Machine Check Exception.');
+    syslog.writestringln('Machine Check Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/NCE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('NC', 'No Coprocessor Exception.');
-    console.writestringln('No Coprocessor Exception.');
+    syslog.writestringln('No Coprocessor Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/NMIE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('NMI', 'Non-Maskable Interrupt Exception.');
-    console.writestringln('NMI Exception.');
+    syslog.writestringln('NMI Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/OOBE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('OOB', 'Out of Bouunds Exception.');
-    console.writestringln('OOB Exception.');
+    syslog.writestringln('OOB Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/PF.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('PF', 'Page Fault.');
-    console.writestringln('Page Fault.');
+    syslog.writestringln('Page Fault.');
     util.halt_and_catch_fire;
 end;
 

src/fault/SFE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('SF', 'Stack Fault Exception.');
-    console.writestringln('Stack Fault Exception.');
+    syslog.writestringln('Stack Fault Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/SNPE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(true);
     BSOD('SNS', 'Segment Not Present Exception.');
-    console.writestringln('Segment Not Present Exception.');
+    syslog.writestringln('Segment Not Present Exception.');
     util.halt_and_catch_fire;
 end;
 

src/fault/UIE.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     util,
-    console,
+    syslog,
     isr_types,
     isrmanager,
     IDT;
@@ -40,7 +40,7 @@ begin
     CLI;
     correctInterruptRegisters(false);
     BSOD('UI', 'Unknown Interrupt Exception.');
-    console.writestringln('Unknown Interrupt Exception.');
+    syslog.writestringln('Unknown Interrupt Exception.');
     util.halt_and_catch_fire;
 end;