add github actions

.github/workflows/ci.yml

@@ -0,0 +1,68 @@
+name: codecov-rs CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    name: Lint (rustfmt + clippy)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
+      - name: Run lint
+        run: |
+          cargo fmt --all --check
+          cargo clippy
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
+      - name: Run build
+        run: |
+          cargo build
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4-beta
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: stable
+      - name: Run tests
+        run: |
+          cargo test
+      - name: Install `cargo llvm-cov`
+        uses: taiki-e/install-action@cargo-llvm-cov
+      - name: Collect coverage
+        run: |
+          cargo llvm-cov --no-default-features --lcov --output-path lcov.info
+      - name: Upload to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_ORG_TOKEN }}