[Feature Request] Create sample for calling Python Client from a sync method

Is your feature request related to a problem? Please describe.

There are many Temporal users that have existing Python code bases that are only sync, and for these users learning how to invoke the Temporal Client is toil, as they may not be fully versed in asyncio and the event loop. Having a sample that provides a snippet on how to use the Temporal Client from an existing sync method would be very helpful for these folks as part of the getting started experience.

Describe the solution you'd like

I'd like a hello world style sample that creates a client and then invokes client.start_workflow or client.execute_workflow from within a synchronous method

Additional context

Esamina innanzitutto gli esempi hello-world esistenti nel repository e i pattern di utilizzo di Python Client; nell’issue non sono indicati file o test specifici. Aggiungi un esempio in cui client.start_workflow o client.execute_workflow venga chiamato da un metodo sincrono, quindi verifica che l’esempio venga eseguito come parte dell’esperienza getting-started.