chore(github): add commitlint to github actions

Author: floryst

.github/workflows/pr-checks.yml

@@ -0,0 +1,18 @@
+name: PR Checks
+on: pull_request
+
+jobs:
+  pr-checks:
+    runs-on: ubuntu-20.04
+    name: Check and lint PR
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Setup node
+        uses: actions/setup-node@v1
+        with:
+          node-version: 16
+      - run: npm ci
+      - name: Lint commits
+        run: npx commitlint --from=${{ github.event.pull_request.base.sha }}