fix(acp): handle question.asked event to prevent hanging

[Meskjei]

Issue for this PR

Closes #17920

Type of change

• Bug fix
• New feature
• Refactor / code improvement
• Documentation

What does this PR do?

When OpenCode runs via ACP, the question tool would hang indefinitely because the question.asked event was not handled in the ACP agent's handleEvent method.

The fix adds a new case handler for question.asked that:

1. Converts question options to ACP requestPermission options
2. Forwards the question to the ACP client via requestPermission
3. Maps the client's response back to question answers
4. Calls the SDK's question.reply() or question.reject() to unblock the tool

This follows the same pattern as the existing permission.asked handler.

How did you verify your code works?

• Ran bun run --cwd packages/opencode typecheck - passes
• The change follows the existing permission.asked handler pattern which is proven to work

Screenshots / recordings

N/A - This is a backend change, no UI changes.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search, I found one potentially related PR:

Related PR:

• feat(acp): enable question tool for ACP clients #13750 - feat(acp): enable question tool for ACP clients
  • This PR is related as it previously enabled the question tool for ACP clients. Your PR (17921) extends that work by specifically handling the question.asked event to prevent hanging, which appears to be a follow-up fix to the earlier feature implementation.

The current PR #17921 is appropriately addressing a specific issue (issue #17920) with the question tool hanging in ACP, so this appears to be a targeted fix rather than a duplicate.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍

[rekram1-node]

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