Add generate-release-maintenance.yaml

A new workflow file to accept the release tag and date as inputs, run
the maintenance script, and then create a pull request with the changes.

Author: pmkovar

.github/workflows/generate-release-maintenance.yaml

@@ -0,0 +1,48 @@
+name: Generate Release Maintenance
+
+on:
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: 'The release version (e.g., v2.11.10-alpha1)'
+        required: true
+      release_date:
+        description: 'The release date (e.g., Jan 28, 2026)'
+        required: true
+
+jobs:
+  build-and-commit:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Generate Release Notes
+        run: ./release-maintenance.sh -t "${{ inputs.release_tag }}" -d "${{ inputs.release_date }}"
+
+      - name: Create Pull Request
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG: ${{ inputs.release_tag }}
+        run: |
+          # Extract version from tag (e.g., v2.11.10-alpha1 -> v2.11.10)
+          VERSION=${TAG%%-*}
+          BRANCH_NAME="${VERSION}-maintenance"
+
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+          git checkout -b "$BRANCH_NAME"
+          git add .
+          git commit -m "$VERSION - Rancher Manager Release Maintenance"
+          git push origin "$BRANCH_NAME"
+
+          gh pr create \
+            --title "$VERSION - Rancher Manager Release Maintenance" \
+            --body "Automated release maintenance updates for version $VERSION." \
+            --base main \
+            --head "$BRANCH_NAME"