ci: add ci tests, checks (clippy, fmt)

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  ci:
+    name: Check, test, lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: Format
+        run: cargo fmt --check
+
+      - name: Build
+        run: cargo build
+
+      - name: Clippy
+        run: cargo clippy -- -D warnings
+
+      - name: Test
+        run: cargo test