Add github workflow to check pre-commit hooks on all files on master branch

.github/workflows/code-quality-master.yml

@@ -0,0 +1,22 @@
+# Same as `code-quality-pr.yaml` but triggered on commit to master branch
+# and runs on all files (instead of only the changed ones)
+
+name: Code Quality Master
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  code-quality:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+
+      - name: Run pre-commits
+        uses: pre-commit/action@v2.0.3