Initial commit: OpenCode Context Filter Proxy v1.0

- Add HTTP proxy server for filtering repository context
- Add automatic wrapper script for OpenCode integration
- Add installation script with interactive setup
- Add comprehensive documentation (SETUP, USAGE, TROUBLESHOOTING, TECHNICAL)
- Add test suite (basic, realistic, extreme context tests)
- Add support for llama3.2:1b and qwen2.5:1.5b models
- Add MIT License and standard project files

Performance: 99% token reduction, 8x faster inference