AI Chat: enhance the UI and UX of the ClaudeCode AskUserQuestion tool

[safisa]

What it does

Fixes: #16996

Example with single-select:

Example with multi-select:

How to test

1. In Chat AI, try: @claudecode use AskUserQuestion tool to ask me any question about my mood
2. The same, but add: allow multi-select too
3. Validate that the question lable and description in each option
4. Validate the Header is rendered on top
5. Validate the X ixon on the top right to dismiss the question
6. Test also the built-in AskAndContinueSample still working as expected

Follow-ups

Breaking changes

• This PR introduces breaking changes and requires careful review. If yes, the breaking changes section in the changelog has been updated.

Attribution

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines
• User-facing text is internationalized using the nls service (for details, please see the Internationalization/Localization section in the Coding Guidelines)

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

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[safisa]

Hi @planger,
Can you please review this PR?

[planger]

Thank you for the enhancements of the question response part! Looks nice!

I have a few concerns inline below though. Thanks!

[safisa]

Hi @planger
I believe I’ve addressed all the comments above. Could you please review them?
Thanks