refactor: namespace restructure of entire codebase

Reorganize all source files into a hierarchical namespace structure
with dot-separated unit names matching directory paths.

Major changes:
- src/prog/ -> src/app/ (app.*.pas)
- src/fault/ -> src/arch/x86/fault/ (arch.x86.fault.*.pas)
- src/isr/ -> src/arch/x86/isr/ (arch.x86.isr.*.pas)
- src/include/ -> src/core/ (core.*.pas) + src/arch/x86/
- src/driver/ subtree reorganized with driver.* namespace prefixes
- src/driver/storage/con/ -> src/driver/storage/ctl/ (Windows reserved name fix)
- src/driver/storage/ split into con(ctl)/fs/vol/ subdirectories
- src/driver/net/ flattened from l1-l5 layers to driver.net.*.pas
- kernel.pas -> asuro.pas, faults.pas -> arch.x86.faults.pas
- stdio.pas/syslog.pas -> io/io.stdio.pas, io/io.syslog.pas
- processmanager.pas -> proc/proc.mgr.pas
- lmemorymanager.pas -> memory/memory.heap.pas
- Build scripts moved to toolchain/
- Added compat/ shims for lmemorymanager and types
- Added doc/namespace.md tracking the refactor

197 files changed, 6292 insertions(+), 5526 deletions(-)

compat/lmemorymanager.pas

@@ -0,0 +1,75 @@
+{ Compatibility shim: wasuro references the old unit name 'lmemorymanager'.
+  Since wasuro/ cannot be modified, this unit re-exports the public API of
+  memory.heap so that 'uses lmemorymanager' continues to compile. }
+unit lmemorymanager;
+
+interface
+
+uses
+    memory.heap;
+
+const
+    ALLOC_UNIT        = memory.heap.ALLOC_UNIT;
+    DATA_OFFSET       = memory.heap.DATA_OFFSET;
+    PAGE_SIZE_LMM     = memory.heap.PAGE_SIZE_LMM;
+    TOTAL_UNITS       = memory.heap.TOTAL_UNITS;
+    BITMAP_DWORDS     = memory.heap.BITMAP_DWORDS;
+    SIZE_PREFIX       = memory.heap.SIZE_PREFIX;
+    LARGE_ALLOC_MAGIC = memory.heap.LARGE_ALLOC_MAGIC;
+
+type
+    PHeapPageHeader = memory.heap.PHeapPageHeader;
+    THeapPageHeader = memory.heap.THeapPageHeader;
+
+procedure init;
+function kalloc(size : uint32) : void;
+function klalloc(size : uint32) : void;
+procedure klfree(address : uint32);
+function kpalloc(address : uint32) : void;
+procedure kfree(area : void);
+function lmm_total_free : uint32;
+function lmm_page_count : uint32;
+
+implementation
+
+procedure init;
+begin
+    memory.heap.init;
+end;
+
+function kalloc(size : uint32) : void; inline;
+begin
+    kalloc := memory.heap.kalloc(size);
+end;
+
+function klalloc(size : uint32) : void; inline;
+begin
+    klalloc := memory.heap.klalloc(size);
+end;
+
+procedure klfree(address : uint32); inline;
+begin
+    memory.heap.klfree(address);
+end;
+
+function kpalloc(address : uint32) : void; inline;
+begin
+    kpalloc := memory.heap.kpalloc(address);
+end;
+
+procedure kfree(area : void); inline;
+begin
+    memory.heap.kfree(area);
+end;
+
+function lmm_total_free : uint32; inline;
+begin
+    lmm_total_free := memory.heap.lmm_total_free;
+end;
+
+function lmm_page_count : uint32; inline;
+begin
+    lmm_page_count := memory.heap.lmm_page_count;
+end;
+
+end.

compat/types.pas

@@ -0,0 +1,7 @@
+unit types;
+
+interface
+
+implementation
+
+end.