Github actions CI

Using cmake + ninja

.github/workflows/cmake.yml

@@ -0,0 +1,55 @@
+name: CMake
+
+on:
+  push:
+    branches: [ Preview4_0 ]
+  pull_request:
+    branches: [ Preview4_0 ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ${{matrix.os}}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: seanmiddleditch/gha-setup-ninja@master
+    - uses: ilammy/msvc-dev-cmd@v1
+    - name: Setup Environment
+      run:   |
+             if [ "$RUNNER_OS" == "Linux" ]; then
+                  sudo apt-get install -y \
+                    build-essential \
+                    nasm \
+                    libogg-dev \
+                    libxft-dev \
+                    libx11-dev \
+                    libxxf86vm-dev \
+                    libopenal-dev \
+                    libfreetype6-dev \
+                    libxcursor-dev \
+                    libxinerama-dev \
+                    libxi-dev \
+                    libxrandr-dev \
+                    libxss-dev \
+                    libglu1-mesa-dev \
+                    libgtk-3-dev
+             fi
+      shell: bash
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: cmake -B ${{github.workspace}}/build -G Ninja -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DTORQUE_APP_NAME=Torque3D
+
+    - name: Build
+      # Build your program with the given configuration
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}