Add GitHub action to run tests

Author: chrisyarbrough

.github/workflows/test.yml

@@ -0,0 +1,32 @@
+name: Tests
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '10.0.x'
+
+    - name: Restore dependencies
+      run: dotnet restore src/UnityCommandLineLauncher.sln
+
+    - name: Build
+      run: dotnet build src/UnityCommandLineLauncher.sln --no-restore
+
+    - name: Test
+      run: dotnet test src/UnityCommandLineLauncher.sln --no-build