feat: add rustfmt ci

.github/workflows/rustfmt.yml

@@ -0,0 +1,16 @@
+name: "Check Rust formatting"
+on:
+  push:
+  pull_request:
+
+jobs:
+  rustfmt:
+    name: cargo fmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          components: rustfmt
+      - name: Rustfmt Check
+        uses: actions-rust-lang/rustfmt@v1