Add project files.

.github/workflows/publish.yml

@@ -0,0 +1,25 @@
+name: Publish to NuGet
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8'
+
+      - name: Build
+        run: dotnet build --configuration Release
+
+      - name: Push to NuGet
+        run: dotnet nuget push **/*.nupkg --api-key ${{secrets.NUGET_API_KEY}} --source https://api.nuget.org/v3/index.json --skip-duplicate