Add formatting job

Signed-off-by: Marcel Müller <neikos@neikos.email>

.forgejo/workflows/ci.yml

@@ -10,6 +10,16 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
+  formatting:
+    name: hem - Formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Rust
+        uses: https://github.com/dtolnay/rust-toolchain@1.88
+        with:
+          components: rustfmt
+      - run: cargo fmt --check
   build_and_test:
     name: hem - Build & Test
     runs-on: ubuntu-latest