fix: use dotnet nuget to push packages (#1339)

This PR modernizes the NuGet package publishing process by replacing the legacy `nuget.exe` tool with the built-in `dotnet nuget` command. This change follows best practices recommended in [Meziantou's blog]((https://www.meziantou.net/publishing-a-nuget-package-following-best-practices-using-github.htm)) for more reliable and streamlined package publishing.

### Key changes:
- Replaces `nuget/setup-nuget@v2` action with `actions/setup-dotnet@v5`
- Updates push commands from `nuget push` to `dotnet nuget push` with updated parameter syntax

Author: vbreuss

.github/workflows/build.yml

@@ -149,6 +149,8 @@ jobs:
         with:
           name: Packages
           path: Artifacts/Packages
+      - name: Setup .NET SDKs
+        uses: actions/setup-dotnet@v5
       - name: Publish
         run: |
           echo "Found the following packages to push:"
@@ -159,7 +161,7 @@ jobs:
           done
           for entry in Artifacts/Packages/*.nupkg
           do
-            nuget push $entry -Source 'https://api.nuget.org/v3/index.json' -ApiKey ${{secrets.NUGET_API_KEY}} -SkipDuplicate
+            dotnet nuget push $entry --source https://api.nuget.org/v3/index.json --api-key "${{secrets.NUGET_API_KEY}}" --skip-duplicate
           done
       - name: Check pre-release
         id: check-pre-release