Adds .gitea/workflows/build-windows.yml targeting the org's self-hosted
`windows-latest` runner: sets up Python 3.11, installs the project +
PyInstaller, builds dist/macropad.exe, uploads it as an artifact, and on a
v* tag creates/updates a Gitea release and attaches the exe via the Gitea
API. Runs entirely on Windows (no Linux runner required).
Also declare relay_client + aiohttp as PyInstaller hidden imports so the
relay feature (lazily imported in the GUI) is bundled into the exe.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
