add basic GHA jobs (Windows & Mac)

.github/workflows/dotnet.yml

@@ -0,0 +1,58 @@
+name: ci/github-actions
+
+on:
+  push:
+    branches: [ '**' ]
+  pull_request:
+    branches: [ '**' ]
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+
+  winBuild:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: nuget/setup-nuget@v1
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: 7.0.x
+    - name: Install .NET MAUI
+      shell: pwsh
+      run: |
+        & dotnet nuget locals all --clear
+        & dotnet workload install maui --source https://aka.ms/dotnet6/nuget/index.json --source https://api.nuget.org/v3/index.json
+        & dotnet workload install android ios maccatalyst tvos macos maui wasm-tools maui-maccatalyst --source https://aka.ms/dotnet6/nuget/index.json --source https://api.nuget.org/v3/index.json
+    - name: Build library (with nuget package)
+      run: dotnet build ./Source/OxyPlot.Maui.Skia/OxyPlot.Maui.Skia.csproj /p:Configuration=Release /t:restore,build,pack /p:PackageOutputPath=./nuget /p:Version=$(git describe) /p:ContinuousIntegrationBuild=true /p:DeterministicSourcePaths=false
+    - name: Build sample
+      run: dotnet build ./Source/OxyplotMauiSample/OxyplotMauiSample.csproj /p:Configuration=Release /t:restore,build /p:Version=$(git describe) /p:ContinuousIntegrationBuild=true /p:DeterministicSourcePaths=false
+    - name: Upload packages
+      uses: actions/upload-artifact@v3
+      with:
+        name: nupkg
+        path: ./Source/*/nuget/*.nupkg
+
+  macBuild:
+    runs-on: macos-13
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: 7.0.x
+    - name: Install .NET MAUI
+      run: |
+        dotnet nuget locals all --clear
+        dotnet workload install maui --source https://aka.ms/dotnet6/nuget/index.json --source https://api.nuget.org/v3/index.json
+        dotnet workload install android ios maccatalyst tvos macos maui wasm-tools maui-maccatalyst --source https://aka.ms/dotnet6/nuget/index.json --source https://api.nuget.org/v3/index.json
+    - name: Build library (with nuget package)
+      run: dotnet build ./Source/OxyPlot.Maui.Skia/OxyPlot.Maui.Skia.csproj /p:Configuration=Release /t:restore,build,pack /p:Version=$(git describe) /p:ContinuousIntegrationBuild=true /p:DeterministicSourcePaths=false
+    - name: Build sample
+      run: dotnet build ./Source/OxyplotMauiSample/OxyplotMauiSample.csproj /p:Configuration=Release /t:restore,build /p:Version=$(git describe) /p:ContinuousIntegrationBuild=true /p:DeterministicSourcePaths=false