Reorganize project structure for clarity

- Rename tests/wasm-app/ to tests/apps/ for brevity
- Move lib/gl_immediate_shim.js to wasm/shims/ (consolidates WASM files)
- Delete docs/ directory (outdated Nov 2024 research docs)
- Delete patches/ directory (already applied to fork submodules)
- Delete wasm/patches/ and wasm/config/ (empty/unused)
- Update all file references in scripts, configs, and documentation
- Update .gitignore for new tests/apps/ paths

Verified both build workflows pass:
- wxWidgets tests: 255 passed
- Docker KiCad build: completed successfully

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/package.json

@@ -6,8 +6,8 @@
     "test": "playwright test",
     "test:ui": "playwright test --ui",
     "test:headed": "playwright test --headed",
-    "build-wasm": "cd wasm-app && make -f Makefile.wasm",
-    "serve": "npx serve wasm-app -p 8080 -c ../serve.json",
+    "build-wasm": "cd apps && make -f Makefile.wasm",
+    "serve": "npx serve apps -p 8080 -c ../serve.json",
     "setup:kicad": "./scripts/setup-kicad-wasm.sh",
     "test:kicad": "playwright test kicad/",
     "test:kicad:headed": "playwright test kicad/ --headed"