ci: enforce conventional commit format

Author: bchampp

.github/workflows/conventional-commit.yml

@@ -0,0 +1,13 @@
+name: Conventional Commits
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    name: Conventional Commits
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: webiny/action-conventional-commits@v1.4.2