WIP: add rustfmt

Author: vmx

.github/workflows/ci.yml

@@ -33,7 +33,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Run cargo fmt
-        run: cargo fmt --all -- --check
+        run: |
+          rustup component add rustfmt
+          cargo fmt --all -- --check
 
   rustdoc:
     runs-on: ubuntu-24.04