Add workflows for closing and deleting branches on PR merge

.gitea/workflows/pr-delete-branch.yml

@@ -0,0 +1,30 @@
+name: PR Delete Branch (Template)
+
+on:
+  workflow_call:
+    secrets:
+      GITHUB_TOKEN:
+        required: true
+
+jobs:
+  delete-branch:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.merged == true
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Delete merged branch
+        run: |
+          BRANCH_NAME="${{ github.event.pull_request.head.ref }}"
+          echo "Deleting branch: $BRANCH_NAME"
+
+          git config user.name "gitea-actions[bot]"
+          git config user.email "gitea-actions[bot]@gitea"
+
+          git push origin --delete "$BRANCH_NAME" || echo "Failed to delete branch $BRANCH_NAME"
+          echo "Branch $BRANCH_NAME has been deleted"