[Feature Request] Sample of an activity calling a client to schedule or update a workflow

[joshmsmith]

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

I would love to have a sample that shows how to do workflow->workflow interaction with a client, so : workflow->activity->client->workflow interaction

This is a common discussion with customers and a sample in go and python would be amazing to share with them.

Describe the solution you'd like

A sample that shows how to do a client inside a workflow's activity. Ideally it would start a schedule.

Our docs say it is a good option, and I want to point them in that direction:

Additional context

[Abhinav0905]

Hi maintainers, I’d like to work on this issue after completing #103. I propose adding a focused sample for the workflow → activity → client → workflow pattern, with separate worker/starter code, explicit Activity timeouts and retries, usage documentation, and integration coverage. Could you confirm whether the preferred client action is creating a Schedule, or starting/updating a Workflow? If this direction looks right, could you please assign the issue to me? For context, my earlier contribution #343 has been reviewed and merged. Thanks!