Auto add labels on new pull request (#6065)

* add auto labeler github action

* add auto labeler github action

.github/labeler.yml

@@ -0,0 +1,7 @@
+area/docs:
+- 'docs/**/*'
+- 'operator/docs/*'
+sig/operator:
+- 'operator/**/*'
+kind/feature:
+- 'operator/docs/enhancements/*'

.github/workflows/labeler.yml

@@ -0,0 +1,14 @@
+name: "Pull Request Labeler"
+on:
+- pull_request_target
+
+jobs:
+- triage:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v4
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"