fix(wasm): bump wxwidgets for the wxMenuBar Detach() UAF fix

Submodule pointer bump for the wxMenuBar dangling-child fix that resolved the 18 DOM-port kicad e2e failures. Also adds the async-debug dossier (docs/features/async/08-10) root-causing the 'indirect call to null' / 'signature mismatch' family to the menu-bar use-after-free, and folds the asyncify harness into 'npm test' (new test:wx for wx-only); tests/README + WHATWORKS updated to match.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/package.json

@@ -3,7 +3,8 @@
   "version": "1.0.0",
   "description": "Playwright tests for wxWidgets WASM and KiCad",
   "scripts": {
-    "test": "playwright test",
+    "test": "npm run test:wx && npm run test:asyncify:firefox",
+    "test:wx": "playwright test",
     "test:ui": "playwright test --ui",
     "test:headed": "playwright test --headed",
     "build-wasm": "cd apps && make -f Makefile.wasm",