Create repo-pr-enforce-base-branch.yml

.github/workflows/repo-pr-enforce-base-branch.yml

@@ -0,0 +1,15 @@
+name: Repo - Enforce dev as base branch
+on:
+  pull_request:
+    branches: [ master ]
+    types: [ opened ]
+
+jobs:
+  check_pr_target:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check if PR is from dev or hotfix
+        if: ${{ !(startsWith(github.event.pull_request.head.ref, 'hotfix/') || github.event.pull_request.head.ref == 'dev') }}
+        run: |
+          gh pr comment ${{ github.event.number }} --body "This PR targets the `master` branch but does not come from `dev` or a `hotfix/*` branch.\n\nAutomatically setting the base branch to `dev`."
+          gh pr edit ${{ github.event.number }} --base dev