Add GitHub Actions workflow for NuGet release

.github/workflows/nuget.yml

@@ -0,0 +1,63 @@
+name: NuGet Release
+
+on: [push, workflow_dispatch]
+
+concurrency:
+    group: environment-${{github.ref}}
+    cancel-in-progress: true
+
+jobs:
+    build:
+        name: ${{ matrix.platform.name }} ${{ matrix.type.name }}
+        runs-on: ${{ matrix.platform.os }}
+
+        strategy:
+            fail-fast: false
+            matrix:
+                platform:
+                    - { name: Windows VS2022 x86, os: windows-2022, flags: -AWin32 -DBUILD_SHARED_LIBS=FALSE, sfml: -DSFML_USE_STATIC_STD_LIBS=ON, csfml: -DCSFML_LINK_SFML_STATICALLY=ON }
+                    - { name: Windows VS2022 x64, os: windows-2022, flags: -AWx64 -DBUILD_SHARED_LIBS=FALSE, sfml: -DSFML_USE_STATIC_STD_LIBS=ON, csfml: -DCSFML_LINK_SFML_STATICALLY=ON }
+                    - { name: Linux GCC, os: ubuntu-22.04, flags: -GNinja -DBUILD_SHARED_LIBS=TRUE }
+                    - { name: MacOS, os: macos-12, flags: -GNinja -DBUILD_SHARED_LIBS=TRUE }
+
+        steps:
+            - name: Get CMake
+              uses: lukka/get-cmake@latest
+
+            - name: Install Linux Dependencies
+              if: runner.os == 'Linux'
+              run: sudo apt-get update && sudo apt-get install libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev
+
+            - name: Checkout SFML
+              uses: actions/checkout@v3
+              with:
+                  repository: SFML/SFML
+                  ref: 2.6.1
+                  path: SFML
+
+            - name: Configure SFML CMake
+              shell: bash
+              run: cmake -S $GITHUB_WORKSPACE/SFML -B $GITHUB_WORKSPACE/SFML/build -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/SFML/install -DSFML_BUILD_EXAMPLES=FALSE -DSFML_BUILD_TEST_SUITE=FALSE -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_BUILD_TYPE=Release ${{matrix.platform.flags}} ${{matrix.platform.csfml}}
+
+            - name: Build SFML
+              shell: bash
+              run: cmake --build $GITHUB_WORKSPACE/SFML/build --config Release --target install
+
+            - name: Checkout CSFML
+              uses: actions/checkout@v3
+              with:
+                  path: CSFML
+
+            - name: Configure CSFML CMake
+              shell: bash
+              run: cmake -S $GITHUB_WORKSPACE/CSFML -B $GITHUB_WORKSPACE/CSFML/build -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/CSFML/install -DCSFML_BUILD_EXAMPLES=FALSE -DSFML_DIR=$GITHUB_WORKSPACE/SFML/install/lib/cmake/SFML -DCMAKE_VERBOSE_MAKEFILE=ON -DWARNINGS_AS_ERRORS=TRUE -DCMAKE_BUILD_TYPE=Release ${{matrix.platform.flags}} ${{matrix.platform.sfml}}
+
+            - name: Build CSFML
+              shell: bash
+              run: cmake --build $GITHUB_WORKSPACE/CSFML/build --config Release --target install
+
+            - name: Upload Artifact
+              uses: actions/upload-artifact@v3
+              with:
+                  name: CSFML-${{ matrix.platform.name }}
+                  path: $GITHUB_WORKSPACE/CSFML/install