github: add build for macos

Author: mcraveiro

.github/workflows/continuous-macos.yml

@@ -0,0 +1,30 @@
+name: Continuous Linux
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup dotnet
+        uses: actions/setup-dotnet@v2
+        with:
+          dotnet-version: '6.0.x'
+
+      - name: Display .NET info
+        run: dotnet --info
+
+      - run: |
+          cd Src
+          dotnet build
+          dotnet test

README.md

@@ -4,6 +4,7 @@
 [![Gitter](https://img.shields.io/gitter/room/nwjs/nw.js.svg)](https://gitter.im/MASD-Project/Lobby)
 [![Continuous Linux](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-linux.yml/badge.svg)](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-linux.yml)
 [![Continuous Windows](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-windows.yml/badge.svg)](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-windows.yml)
+[![Continuous MacOS](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-windows.yml/badge.svg)](https://github.com/MASD-Project/csharp_ref_impl/actions/workflows/continuous-macos.yml)
 
 # MASD C# Reference Implementation