Python SDK workflow updates

[hhunter-ms]

Description

• Update Python examples in "How to Author"
• Update Python examples in "How to Manage"
• Update quickstart examples

Extra item:

• Update Python example in Conversation quickstart from HTTP to SDK

Issue reference

PR will close: #4410

[github-actions]

Stale PR, paging all reviewers

[msfussell]

Where did you get this example? I do not think you need all these imports. Can we check with Elena?
+++++++++++++++++++++++++++++
from durabletask import worker, task

from dapr.ext.workflow.workflow_context import Workflow
from dapr.ext.workflow.dapr_workflow_context import DaprWorkflowContext
from dapr.ext.workflow.workflow_activity_context import Activity, WorkflowActivityContext
from dapr.ext.workflow.util import getAddress

from dapr.clients import DaprInternalError
from dapr.clients.http.client import DAPR_API_TOKEN_HEADER
from dapr.conf import settings
from dapr.conf.helpers import GrpcEndpoint
from dapr.ext.workflow.logger import LoggerOptions, Logger

[elena-kolevska]

Yeah, there are some unused imports here, and some indentation problems, which will make the snippet error out.
I also think it's important to show the workflow definition.

This should be a good starting point for the example: https://github.com/dapr/python-sdk/blob/release-1.15/examples/workflow/simple.py