feat: add gh CI

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on: [push, pull_request]
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: 1
+
+jobs:
+  fmt:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: fmt
+      run: cargo fmt --check --all
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: clippy
+      run: cargo clippy --all-targets
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: test
+      run: cargo test -- --nocapture --test-threads=1