Add github actions config

Author: bash

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  DOTNET_NOLOGO: 1
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        name: Install Current .NET SDK
+      - name: Restore dependencies
+        run: dotnet restore /p:TreatWarningsAsErrors=true
+      - name: Build
+        run: dotnet build --configuration Release --no-restore /p:TreatWarningsAsErrors=true
+
+  nupkg:
+    name: Package
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-dotnet@v4
+        name: Install Current .NET SDK
+      - name: Generate NuGet Packages
+        run: dotnet pack --configuration Release --output nupkg /p:TreatWarningsAsErrors=true
+      - uses: actions/upload-artifact@v4
+        if: success() && github.ref == 'refs/heads/main'
+        with:
+          name: nupkg
+          path: nupkg/*
+          retention-days: 1