chore: use stylua for formatting (#1040)

* chore: stylua job and config

* reformat with stylua

.github/workflows/lint.yml

@@ -17,3 +17,14 @@ jobs:
 
       - name: Lint
         run: sudo make lint
+
+  stylua:
+    name: stylua
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: JohnnyMorganz/stylua-action@1.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          # CLI arguments
+          args: --color always --check lua/