Add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  ci:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install Rust toolchain
+      uses: actions-rust-lang/setup-rust-toolchain@v1
+      with:
+        components: rustfmt, clippy
+
+    - name: Check formatting
+      run: cargo fmt --all -- --check
+
+    - name: Clippy
+      run: cargo clippy
+
+    - name: Run tests
+      run: cargo test
+
+    - name: Build
+      run: cargo build --release