Refactor Stepwise Planner handler, added logic to allow use of stepwise plan result as bot response

[teresaqhoang]

Motivation and Context

This pull request refactors the use of Stepwise Planner in CC. The changes include a fix to embed the result of the Stepwise Planner into the meta prompt if a valid result is returned and adds a new property to PlannerOptions to indicate whether to use the planner result as the bot response.

Additionally, the ChatSkill class has been updated to handle the new changes, including adding the ability to pass a response string to the HandleBotResponseAsync method and changing the StepwiseThoughtProcess property to a PlanExecutionMetadata object. The PromptDialog component has also been updated to display the Stepwise Planner supplement and raw view when appropriate, and the BotResponsePrompt interface has been updated to include a rawView property (to show the Stepwise Thought Process if the webapi is configured to return the stepwise response directly).

Description

Logic:

1. If Stepwise Planner doesn't return a valid result (i.e., "Result not found"), continue with regular response generation. Planner result will not be included in meta prompt.
   

2. If Stepwise Planner returns a valid result, that result will be supplemented with complementary text to guide the model in using this response in the meta prompt.
   

3. If Stepwise Planner returns a valid result and the webapi is configured to use this result directly, it will be immediately returned to the client.
   

Change Details:

• Update ExternalInformation property in BotResponsePrompt to use SemanticDependency of PlanExecutionMetadata instead of ISemanticDependency.
• Rename StepwiseThoughtProcess class to PlanExecutionMetadata.
• Add RawResult property to PlanExecutionMetadata to store the raw result of the planner.
• Add UseStepwiseResultAsBotResponse property to PlannerOptions to indicate whether to use the planner result as the bot response.
• Add StepwisePlannerSupplement property to PromptsOptions to help guide model in using a response from StepwisePlanner.
• Update ChatSkill to use SemanticDependency of PlanExecutionMetadata instead of StepwiseThoughtProcess.
• Add logic to handle using plan result as bot response if UseStepwiseResultAsBotResponse is true.
• Update HandleBotResponseAsync method to accept rawResult parameter.

Stepwise Thought Proceses available in Prompt details anytime the Stepwise planner is used, even if no result is found.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines and the pre-submission formatting script raises no violations
  - [ ] All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄