Add PR verify action (#171)

Signed-off-by: Jian Qiu <jqiu@redhat.com>

.github/pull_request_template.md

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+<!--
+Thanks for creating a pull request!
+
+If this is your first time, please make sure to review CONTRIBUTING.MD.
+
+Please copy the appropriate `:text:` or icon to the beginning of your PR title:
+
+:sparkles: ✨ feature
+:bug: 🐛 bug fix
+:book: 📖 docs
+:memo: 📝 proposal
+:warning: ⚠️ breaking change
+:seedling: 🌱 other/misc
+:question: ❓ requires manual review/categorization
+
+-->
+## Summary
+
+## Related issue(s)
+
+Fixes #

.github/workflows/pr-verify.yml

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+name: PR Verifier
+
+on:
+  # NB: using `pull_request_target` runs this in the context of
+  # the base repository, so it has permission to upload to the checks API.
+  # This means changes won't kick in to this file until merged onto the
+  # main branch.
+  pull_request_target:
+    types: [opened, edited, reopened, synchronize]
+
+jobs:
+  verify:
+    name: verify PR contents
+    permissions:
+      checks: write
+      pull-requests: read
+    runs-on: ubuntu-latest
+    steps:
+      - name: Verifier action
+        id: verifier
+        uses: kubernetes-sigs/kubebuilder-release-tools@v0.3.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}