Add GitHub Actions workflows for CI/CD

- CI workflow: test suite, formatting check, clippy linting
- Release workflow: cross-platform builds for Linux, macOS, Windows
- Automatic release creation on version tags

Author: Haleclipse

.github/workflows/ci.yml

@@ -0,0 +1,55 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    name: Test Suite
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+
+    - name: Cache cargo registry
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Run tests
+      run: cargo test --verbose
+
+    - name: Check formatting
+      run: cargo fmt -- --check
+
+    - name: Run clippy
+      run: cargo clippy -- -D warnings
+
+  build:
+    name: Build Check
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+
+    - name: Build
+      run: cargo build --release

.github/workflows/release.yml

@@ -0,0 +1,91 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build for ${{ matrix.target }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - target: x86_64-unknown-linux-gnu
+            os: ubuntu-latest
+            name: ccline-linux-x64.tar.gz
+          - target: x86_64-pc-windows-gnu
+            os: ubuntu-latest
+            name: ccline-windows-x64.zip
+          - target: x86_64-apple-darwin
+            os: macos-latest
+            name: ccline-macos-x64.tar.gz
+          - target: aarch64-apple-darwin
+            os: macos-latest
+            name: ccline-macos-arm64.tar.gz
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+      with:
+        targets: ${{ matrix.target }}
+
+    - name: Install cross-compilation tools
+      if: matrix.target == 'x86_64-pc-windows-gnu'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y mingw-w64
+
+    - name: Build binary
+      run: cargo build --release --target ${{ matrix.target }}
+
+    - name: Package Linux/macOS
+      if: matrix.os != 'windows-latest' && matrix.target != 'x86_64-pc-windows-gnu'
+      run: |
+        mkdir -p dist
+        cp target/${{ matrix.target }}/release/ccometixline dist/ccline
+        cd dist
+        tar czf ../${{ matrix.name }} ccline
+
+    - name: Package Windows
+      if: matrix.target == 'x86_64-pc-windows-gnu'
+      run: |
+        mkdir -p dist
+        cp target/${{ matrix.target }}/release/ccometixline.exe dist/ccline.exe
+        cd dist
+        zip ../${{ matrix.name }} ccline.exe
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ matrix.name }}
+        path: ${{ matrix.name }}
+
+  release:
+    name: Create Release
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Download artifacts
+      uses: actions/download-artifact@v4
+      with:
+        path: artifacts
+
+    - name: Create Release
+      uses: softprops/action-gh-release@v1
+      with:
+        files: artifacts/*/*
+        generate_release_notes: true
+        draft: false
+        prerelease: false
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}