[Epic][TypeSpec Authoring] Implement update the typespec base on azure guidelines and best practices

This epic is to support the scenario that the existing resource/operation/model does not meet service requirement and align azure guideline and best practices, need to update the typespec definition.

| category | component |
|------------------------|----------------------------------------|
|resource| delete operation|
|| remote operation|
|operation| update headers (e.g.LRO headers)|
||update operation path|
|| update operation response|
|| update request|
|model| update properties|
|| update the decorators|

for each update flow:
Agent:
Step 1: Intake & Clarification (no file edits)
Step 2: Call the azure-sdk-mcp/azsdk_typespec_consult tool to retrieve solution (must happen)
Step 3: Apply Changes (edits)
Step 4: Validate
Step 5: Summarize

provide prompt sample for the update task.