Add cargo-udeps build step

.gitea/workflows/rust.yml

@@ -49,3 +49,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
       - run: cargo build
+
+      - name: Run cargo-udeps
+        uses: aig787/cargo-udeps-action@v1
+        with:
+          version: 'latest'
+          args: '--all-targets'
+