workflows: support set custom status

[famarting]

Describe the proposal

equivalent to dapr/go-sdk#635

to bring parity with other dapr workflow sdks

[famarting]

first part implemented here microsoft/durabletask-js#68

[dapr-bot]

This issue has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in the next 7 days unless it is tagged (pinned, good first issue, help wanted or triaged/resolved) or other activity occurs. Thank you for your contributions.

[dapr-bot]

This issue has been automatically closed because it has not had activity in the last 67 days. If this issue is still valid, please ping a maintainer and ask them to label it as pinned, good first issue, help wanted or triaged/resolved. Thank you for your contributions.