ci: add ci workflow

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: CI
+on:
+  push:
+    branches: ["*"]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        rust: [stable, nightly]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Restore cargo cache
+        uses: actions/cache@v2.1.7
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ matrix.rust }}-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          default: true
+          profile: minimal
+          components: clippy
+
+      - name: Build Debug
+        run: |
+          rustc --version
+          cargo build
+
+      - name: Run clippy
+        run: cargo clippy -- -D warnings
+
+  rustfmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          components: rustfmt
+      - run: cargo fmt -- --check