test(ci): add workflow

.github/workflows/test.yml

@@ -0,0 +1,21 @@
+on: [push, pull_request]
+
+name: Test
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install toolchain
+        run: rustup show
+      - uses: Swatinem/rust-cache@v2
+      - name: Run cargo fmt
+        run: cargo +nightly fmt -- --check
+
+      - name: Run cargo clippy
+        run: cargo clippy -- -D warnings
+
+      - name: Run cargo test
+        run: cargo test