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>

README.md

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+# KiCad WebAssembly Port
+
+Experimental project to run KiCad's core logic in WebAssembly.
+
+## Project Structure
+
+```
+kicad-wasm/
+├── kicad/          # KiCad source (git submodule)
+├── patches/        # Patches to make deps optional
+├── stubs/          # Stub headers for disabled deps
+├── cmake/          # CMake modules
+├── scripts/        # Build and maintenance scripts
+├── core/           # Extracted core library for Wasm
+└── docs/           # Knowledge base and plans
+```
+
+## Goals
+
+1. **Phase 1**: Build KiCad with optional deps disabled (curl, git, OCC, ngspice)
+2. **Phase 2**: Extract core computation code as standalone library
+3. **Phase 3**: Compile core to WebAssembly
+4. **Phase 4**: Run native GUI with Wasm worker backend
+5. **Phase 5**: Browser-based UI
+
+## Documentation
+
+- [Implementation Plan](docs/IMPLEMENTATION_PLAN.md)
+- [Knowledge Base (Summary)](docs/KNOWLEDGE_BASE.md)
+- [Knowledge Base (Full)](docs/KNOWLEDGE_BASE_FULL.md)
+
+## Design Decisions
+
+- **Memory**: Serialize/deserialize on every operation (proof of concept)
+- **Threading**: Web Workers (browser-first design)
+- **Updates**: Full board re-serialization
+
+## Getting Started
+
+```bash
+# Clone with submodules
+git clone --recursive <repo-url>
+
+# Apply patches
+./scripts/prepare.sh
+
+# Build with optional deps disabled
+mkdir build && cd build
+cmake .. -DKICAD_USE_CURL=OFF -DKICAD_USE_GIT=OFF -DKICAD_USE_OCC=OFF
+make -j$(nproc)
+```
+
+## License
+
+KiCad is GPL-3.0. This wrapper/tooling follows the same license.