The act_runner cannot create /home/act_runner cache dir inside
container images. Replace actions/checkout@v4 with manual
git clone using GITHUB_SERVER_URL and GITHUB_REPOSITORY env vars.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Adds .gitea/workflows/ci.yaml with lint and test jobs.
Runs on gitea.meghsakha.com with Gitea Actions runner.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>