feat: Add GitHub Actions workflow for building across multiple platforms

Author: lijy91

.github/workflows/build.yml

@@ -0,0 +1,50 @@
+name: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        include:
+          - os: ubuntu-latest
+            platform: linux
+          - os: windows-latest
+            platform: windows
+          - os: macos-latest
+            platform: macos
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up CMake
+      run: |
+        cmake --version
+        if [ "${{ matrix.platform }}" = "linux" ]; then
+          sudo apt-get update
+          sudo apt-get install -y ninja-build libgtk-3-dev
+        fi
+
+    - name: Configure CMake
+      run: |
+        mkdir build
+        cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Release
+
+    - name: Build Examples
+      run: |
+        cd build
+        cmake --build . --config Release
+
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: examples-${{ matrix.platform }}
+        path: build/examples/screen_info/