Refactor CI workflow to include Rust build and test steps

.gitea/workflows/test.yaml

@@ -1,17 +1,38 @@
-name: runner-test
+name: Rust CI
 
 on:
   push:
+    branches: ["**"]
+  pull_request:
 
 jobs:
-  test:
+  build-test:
     runs-on: ubuntu-latest
-    steps:
-      - name: Say hello ok
-        run: echo "Runner OK"
 
-  test2:
-    runs-on: ubuntu-latest
     steps:
-      - name: 2 Say hello ok
-        run: echo "Runner OK"
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust (stable)
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: cargo-${{ runner.os }}-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Format (check)
+        run: cargo fmt --all -- --check
+
+      - name: Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Build (release)
+        run: cargo build --release
+
+      - name: Test
+        run: cargo test --all --all-features