Add Rust tests job

.forgejo/workflows/build.yaml

@@ -57,3 +57,14 @@ jobs:
         run: pip install -r requirements.txt
       - name: Build Rust code
         run: maturin develop
+
+  test-rust:
+    name: Test Rust
+    runs-on: docker
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up Rust
+        uses: https://github.com/actions-rust-lang/setup-rust-toolchain@v1
+      - name: Run Rust tests
+        run: cargo test