- Introduced support for Arduino UNO R3, UNO R4 Minima, and simulation environments.
- Added `.board-config` for board-specific configuration.
- Created `MULTI_BOARD_QUICK_REFERENCE.md` for quick development guidance.
- Added `MULTI_BOARD_TESTING.md` for comprehensive cross-platform testing procedures.
- Updated `README.md` with detailed multi-board support and workflow instructions.
- Enhanced platform-specific code handling in `main.cpp` for compatibility with AVR and Renesas architectures.
- Remove Unity library dependency from CMakeLists.txt
- Embed minimal Unity implementation directly in test file
- Fixes 'Cannot find source file: lib/Unity/unity.cpp' error in CI
- Maintains compatibility with PlatformIO Unity for native tests
- All tests pass locally with embedded Unity framework
- Update GitHub Actions workflow to use CMake 4.1.0 instead of 3.20.0
- Update CMakeLists.txt minimum version requirement to 4.1.0
- Fixes 'Unrecognized version field' error in CMake presets
- Ensures compatibility between local and CI environments
james.maes