alexion
40859b9e6b
Add `pr merge` with all six Gitea methods, the three common-method shorthands, `--auto`, `--delete-branch`, `--subject`, `--body`/`--body-file`, and `--merge-commit-id` (required with and only valid for `--method manually-merged`). Conflicting method flags and the manually-merged/commit-id pairing are rejected as VALIDATION_ERROR before any API call. An already-merged PR short-circuits to a `pull_request` entity block with `merged_by`/`merged_at`; merge-blocked 405/409 responses surface as VALIDATION_ERROR with update-branch/checkout remediation. Add `pr update-branch` merging the base into the head via the update endpoint with `--style <merge|rebase>` (default merge).