Sample updates (September 2025)

[natali0r]

Change log:

• Added Python implementation of Workload Backend service.
  • Python backend is located in backend\python
  • .NET (C#) implementation of the Workload Backend moved to backend\dotnet
• Added Workload manifest schema validation tool (PowerShell).
  See README for more details.
• Added capability to create item via Fabric standard create dialog.
  • Requires additional field "createItemDialogConfig" in workload frontend manifest
  • Requires handling create success and failure events in index.worker.ts.
  • Supported in JSON schema version: 1.100 or greater
• Added "Onelake catalog" category sample to item frontend manifest