Add formatting check workflow

.github/workflows/formatting_check.yml

@@ -0,0 +1,12 @@
+name: formatting_check
+run-name: Check code formatting
+on: [push, pull_request]
+jobs:
+  formatting_check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install dependencies
+      - uses: actions/checkout@v3
+      - uses: paolorechia/pox@v1.0.1
+        with:
+          tox_env: "format_check"