feat: add submit answer and force timeout

[dinahmaccodes]

Description

This pull request adds robust answer submission and timeout handling to the RoundPlayer model, along with comprehensive tests to ensure correct behavior and statistics tracking. The main changes are the introduction of two new methods for answer submission and timeout, as well as a suite of tests covering various scenarios.

New answer handling functionality

• Added a submit_answer method to RoundPlayerTrait that validates answer submissions, updates player statistics (such as total/correct answers, scores, best and average times), handles timeouts, and returns detailed results.
• Added a force_timeout method to RoundPlayerTrait to explicitly handle answer timeouts, updating statistics and returning a result indicating a timeout occurred.

Testing and validation

• Introduced extensive unit tests for submit_answer and force_timeout, covering correct/incorrect answers, timeouts, invalid states (no active card, round completed, invalid time), and statistics accumulation including best/average time and score tracking.

All tests passing
Closes #136

[dinahmaccodes]

@Xaxxoo @manlikeHB
Please review

[manlikeHB]

Thank you! LGTM!