Initial project setup for KiCad WebAssembly port

- Add KiCad fork as git submodule
- Create project structure (patches, stubs, cmake, scripts, core, docs)
- Add knowledge base and implementation plan documentation
- Add README with project overview and goals

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

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

.gitignore

@@ -0,0 +1,29 @@
+# Build directories
+build/
+build-*/
+cmake-build-*/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# Compiled objects
+*.o
+*.obj
+*.a
+*.so
+*.dylib
+*.dll
+
+# WebAssembly output
+*.wasm
+*.js.map
+
+# macOS
+.DS_Store
+
+# Emscripten cache
+.emscripten_cache/