Implement game ending mechanism

[Gawor270]

No description provided.

[linear]

FCE-2104 Implement game ending mechanism

[Copilot]

Pull Request Overview

This PR implements a mechanism to end the game when players correctly solve riddles. The implementation uses ElevenLabs' client tool system to trigger game termination after a correct answer is provided.

Key Changes:

• Added client tool registration for game-ending events
• Implemented room tracking to prevent duplicate game-ending calls
• Created client tool instructions for when to trigger game ending

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
elevenlabs-session.ts	Added game-ending tool registration, client tool handler, and room tracking logic
client-tool-instructions.md	Created instructions for the AI agent on when to trigger the game-ending tool
config.ts	Exported the client tool instructions constant

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