feat: add stylua ci

.github/workflows/ci.yml

@@ -0,0 +1,15 @@
+name: lua style check
+
+on: push
+
+jobs:
+  style:
+    runs-on: ubuntu-latest
+    steps:
+        - uses: actions/checkout@v4
+        - uses: JohnnyMorganz/stylua-action@v4
+          with:
+            token: ${{ secrets.GITHUB_TOKEN }}
+            version: latest
+            # CLI arguments
+            args: --check ./nvim