Add GitHub Actions CI for Linux, macOS, and Windows

Author: 0xeb

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, cmake ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            name: Linux (GCC)
+            cmake_generator: "Unix Makefiles"
+          - os: macos-latest
+            name: macOS (Clang)
+            cmake_generator: "Unix Makefiles"
+          - os: windows-latest
+            name: Windows (MSVC)
+            cmake_generator: "Visual Studio 17 2022"
+
+    name: ${{ matrix.name }}
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Configure CMake
+      run: cmake -B build -G "${{ matrix.cmake_generator }}"
+
+    - name: Build
+      run: cmake --build build --config Release
+
+    - name: Run Tests
+      run: ctest --test-dir build -C Release --output-on-failure