This PR adds official REST API endpoints to rerun Gitea Actions workflow
runs and individual jobs:
* POST /api/v1/repos/{owner}/{repo}/actions/runs/{run}/rerun
* POST /api/v1/repos/{owner}/{repo}/actions/runs/{run}/jobs/{job_id}/rerun
It reuses the existing rerun behavior from the web UI and exposes it
through stable API routes.
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Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>
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