add rust tests

.github/workflows/rust_tests.yml

@@ -0,0 +1,29 @@
+name: Rust Tests (prompt and llm gateway)
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup | Rust
+        run: rustup toolchain install stable --profile minimal
+
+      - name: Setup | Install wasm toolchain
+        run: rustup target add wasm32-wasi
+
+      - name: Build wasm module
+        run: cd crates && cargo build --release --target=wasm32-wasi
+
+      - name: Run unit tests
+        run: cd crates && cargo test --lib
+
+      - name: Run integration tests
+        run: cd crates && cargo test --test integration