Update Conductor to use the `AskUser` tool

Description:
The Conductor extension's interactive commands (setup, newTrack, review, etc.) currently rely on
unstructured, free-text prompts (e.g., asking the user to "Type A or B" or "Reply with yes/no"). This
approach is fragile and inconsistent with the platform's capabilities.

Current Behavior:

• The agent manually instructs the user to type specific keywords or letters to make selections.
• The agent must parse natural language responses, leading to potential errors if the user deviates from
  the expected format (e.g., typing "yep" instead of "yes").
• Long interaction flows (like the project setup interview) require many individual turns, slowing down the
  process.

Expected Behavior:

• All human-in-the-loop interactions should utilize the AskUser tool.
• Yes/No questions should use the yesno type for binary decisions.
• Menu selections should use the choice type (single or multi-select) to prevent invalid inputs.
• Data gathering steps should use the text type with placeholders.
• Related questions (e.g., defining a tech stack) should be batched into single tool calls to reduce
  latency and friction.

Related issues:
https://github.com/google-gemini/gemini-cli/issues/17689