[Backport release/0.2.z] ci: add backport action (#345)

Co-authored-by: Carlos Feria <[email protected]>

Author: github-actions[bot]

.github/workflows/backport.yaml

@@ -0,0 +1,29 @@
+name: Backport
+on:
+  pull_request_target:
+    types: [ closed ]
+  issue_comment:
+    types: [ created ]
+permissions:
+  contents: write
+  pull-requests: write
+jobs:
+  backport:
+    name: Backport pull request
+    runs-on: ubuntu-latest
+    if: >
+      (
+        github.event_name == 'pull_request_target' &&
+        github.event.pull_request.merged
+      ) || (
+        github.event_name == 'issue_comment' &&
+        github.event.issue.pull_request &&
+        github.event.comment.user.id != 97796249 &&
+        startsWith(github.event.comment.body, '/backport')
+      )
+    steps:
+      - uses: actions/checkout@v4
+      - name: Create backport pull requests
+        uses: korthout/backport-action@v3
+        with:
+          merge_commits: skip