Question Desk 1.0.0

Added

• Anonymous audience Q&A as a Google Apps Script web app: rotating room QR code,
  per-device cooldown, room-wide cap, and a facilitator queue grouped by topic.
• Gemini language detection, translation and topic grouping in one call, with topic
  labels in the moderator's language so questions group across languages.
• "Merge into one question" for reading a topic aloud.
• Participant page in English, Korean and Spanish.