feature: boot.mgr replace hardcoded init sequence with dependency-driven boot manager

Introduce boot.mgr - a self-registering, dependency-ordered boot
initialization framework with barrier-based phasing and glob pattern
matching. Units now declare their own init procedures and dependencies
via registerBoot()/registerBarrier() in their initialization sections,
boot.mgr.run() topologically sorts and executes them.

- Add src/boot/boot.mgr.pas with topoSort, glob matching, barrier
  two-pass algorithm, and boot tree printer
- Gut src/asuro.pas (kmain): now just stores multiboot info, calls
  System.init(), boot.mgr.run, and yield()
- Add initialization sections with registerBoot() to 53 existing units
- Add new units: core.pas, test.pas, driver.storage.boot.pas,
  app.wasm.pas, app.bsod.pas (factored out of asuro.pas)
- Define 9 barrier phases: immediate -> early -> middle -> storage ->
  bus -> device -> bus.late -> late -> final
- Fix xHCI ISR: exclude PRC/WRC from PORTSC change bit clearing to
  prevent race with port reset busy-wait
- Fix driver.bus.usb.core fire_completion_hooks: guard against uint32
  underflow when CompletionHookCount = 0
- Move auto_mount_volumes from device barrier to late barrier so it
  runs after PCI scan discovers storage controllers
- Add toolchain/compile_initcalls.sh for boot entry extraction
- Add Boot Registration sections to all 51 doc files; create 4 new
  doc files; rewrite boot.mgr.md; update mkdocs.yml nav

src/test/test.pas

@@ -0,0 +1,79 @@
+unit test;
+
+interface
+
+uses
+    boot.mgr;
+
+procedure init();
+procedure runAllTests();
+
+implementation
+
+uses
+    core.strings,
+    driver.bus.usb.types,
+    driver.bus.usb.core,
+    driver.bus.usb.uhci,
+    driver.bus.usb.ohci,
+    driver.bus.usb.ehci,
+    driver.bus.usb.xhci,
+    driver.bus.usb.hub,
+    driver.hid.usb.keyboard,
+    driver.hid.usb.mouse,
+    core.ds.fifo,
+    core.ds.cfifo,
+    core.ds.cfifols,
+    core.ds.lifo,
+    core.ds.circ,
+    wasm.test,
+    core.ds.minh,
+    core.ds.maxh,
+    core.ds.prio,
+    driver.storage.vfs,
+    driver.storage.test,
+    core.enc.fnv1a,
+    core.enc.djb2,
+    core.ds.bloom,
+    core.fmt.json;   
+
+procedure init();
+begin
+    { Stub for now }
+end;
+
+procedure runAllTests();
+begin
+    { Run unit tests }
+    core.strings.UnitTest;
+    driver.bus.usb.types.UnitTest;
+    driver.bus.usb.core.UnitTest;
+    driver.bus.usb.uhci.UnitTest;
+    driver.bus.usb.ohci.UnitTest;
+    driver.bus.usb.ehci.UnitTest;
+    driver.bus.usb.xhci.UnitTest;
+    driver.bus.usb.hub.UnitTest;
+    driver.hid.usb.keyboard.UnitTest;
+    driver.hid.usb.mouse.UnitTest;
+    core.ds.fifo.UnitTest;
+    core.ds.cfifo.UnitTest;
+    core.ds.cfifols.UnitTest;
+    core.ds.lifo.UnitTest;
+    core.ds.circ.UnitTest;
+    wasm.test.run_all_tests;
+    core.ds.minh.UnitTest;
+    core.ds.maxh.UnitTest;
+    core.ds.prio.UnitTest;
+    driver.storage.vfs.UnitTest;
+    driver.storage.test.UnitTest;
+    core.enc.fnv1a.UnitTest;
+    core.enc.djb2.UnitTest;
+    core.ds.bloom.UnitTest;
+    core.fmt.json.UnitTest;
+end;
+
+initialization
+    boot.mgr.registerBoot('asuro.test.init', @init, 'Initialize Test Framework', BOOT_MGR_BARRIER_MID);
+    boot.mgr.registerBoot('asuro.test.run', @runAllTests, 'Run Unit Tests', BOOT_MGR_BARRIER_LATE);
+
+end.