docs: Add documentation for AskQuestion tool in CLI

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Summary

The AskQuestion tool was added to the CLI in PR #10845 but is not documented in the tool permissions or reference documentation.

Feature Details

The AskQuestion tool allows the LLM to ask clarifying questions to gather requirements, preferences, or implementation details before proceeding. Features include:

• Interactive quiz-style prompts in TUI mode
• Arrow-key selection for options
• Free-form text answers when no options provided
• Default answer support
• Read-only tool (allowed by default in standard and plan modes)

Suggested Documentation

Update the following docs:

1. docs/cli/tool-permissions.mdx - Add AskQuestion to the list of read-only tools that default to allow
2. Consider adding to a tools reference section with:
   • Tool name: AskQuestion
   • Parameters: question, options[], defaultAnswer
   • Use cases and examples

Reference

• Implementation PR: feat(cli): quiz answers #10845
• Code reference: extensions/cli/src/tools/definitions/AskQuestion.ts

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Co-Authored-By: Continue noreply@continue.dev