docs(build): add canonical build instructions, pyproject.toml, and add more radio presets (#7222)

Co-authored-by: raphaelcoeffic <1050031+raphaelcoeffic@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-authored-by: Peter Feerick <peter.feerick@gmail.com>

.github/workflows/validate_hw_defs.yml

@@ -29,7 +29,7 @@ jobs:
 
       - name: Install Python dependencies
         working-directory: .
-        run: uv venv && uv pip install -r requirements.txt
+        run: uv sync
 
       - name: Check Python script syntax
         run: uv run python3 -m py_compile *.py