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- Delete docs/ directory (outdated Nov 2024 research docs)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>

.gitignore

@@ -39,15 +39,15 @@ wxwidgets-clean/
 /tests/test-results/
 /tests/.test-port
 /test-results/
-/tests/wasm-app/*.js
-/tests/wasm-app/*.html
-/tests/wasm-app/minimal_test.wasm
-/tests/wasm-app/standalone/*/*.js
-/tests/wasm-app/standalone/*/*.html
-/tests/wasm-app/standalone/*/*.wasm
-/tests/wasm-app/kicad/*.js
-/tests/wasm-app/kicad/*.wasm
-!tests/wasm-app/kicad/pcbnew.html
+/tests/apps/*.js
+/tests/apps/*.html
+/tests/apps/minimal_test.wasm
+/tests/apps/standalone/*/*.js
+/tests/apps/standalone/*/*.html
+/tests/apps/standalone/*/*.wasm
+/tests/apps/kicad/*.js
+/tests/apps/kicad/*.wasm
+!tests/apps/kicad/pcbnew.html
 /temp/
 *.log
 *.tmp