chore: validate PR titles with conventional commits (#629)

* chore: validate PR titles with conventional commits

* chore: run PR title lint on reopen

Author: dustinbyrne

.github/workflows/lint-pr.yml

@@ -0,0 +1,26 @@
+name: Lint PR
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - reopened
+      - synchronize
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint-pr:
+    name: Validate PR title against Conventional Commits
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    permissions:
+      contents: read
+      pull-requests: read
+    steps:
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # pin v6.1.1
+        env:
+          GITHUB_TOKEN: ${{ github.token }}