Add nuget publish stage.

.github/workflows/ci.yml

@@ -148,3 +148,28 @@ jobs:
         run: |
           gh release create ${{ needs.build.outputs.tag }} --title "Release ${{ needs.build.outputs.version }}"
           gh release upload ${{ needs.build.outputs.tag }} NWNX.NET.zip
+
+  nuget:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
+    needs: build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+
+      - name: Download Release Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: Binaries
+          path: bin/Release
+
+      - name: NuGet Publish
+        run: dotnet nuget push bin/Release/*.nupkg --api-key ${{ secrets.NUGET_KEY }} --source https://api.nuget.org/v3/index.json
+
+      - name: GitHub Publish
+        run: dotnet nuget push bin/Release/*.nupkg --api-key ${{ secrets.GITHUB_TOKEN }} --source https://nuget.pkg.github.com/nwn-dotnet/index.json