ci: consistently enforce the yazi lua coding style

This commit adds a GitHub Actions workflow that checks the lua files
against the yazi lua coding style.

The workflow uses the `stylua` tool, which can be installed using cargo:

```sh
cargo install stylua --features lua54
```

I picked the options for the formatter in a way that forced minimal
changes to the existing style.

<https://github.com/JohnnyMorganz/StyLua?tab=readme-ov-file#options>

Update .github/workflows/check.yml

Co-authored-by: 三咲雅 · Misaki Masa <sxyazi@gmail.com>

.github/workflows/check.yml

@@ -39,3 +39,15 @@ jobs:
 
       - name: Rustfmt
         run: cargo +nightly fmt --all -- --check
+
+  stylua:
+    name: stylua
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: JohnnyMorganz/stylua-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: latest
+          # CLI arguments
+          args: --color always --check .

.styluaignore

@@ -0,0 +1,2 @@
+# this file caused some issues with the build system
+yazi-plugin/preset/plugins/mime.lua

stylua.toml

@@ -0,0 +1,3 @@
+indent_width = 2
+call_parentheses = "NoSingleTable"
+collapse_simple_statement = "FunctionOnly"