Implement the `CHALLENGE_UNO` event in the game engine

[kuv2707]

Description

Now that we have implemented the ANNOUNCE_UNO event, we can also add the CHALLENGE_UNO event, which is triggered by players when a player didn't announce uno while they had time.

• Do add tests verifying the logic and functionality
• Refer to the events directory in uno-game-engine for context on how to implement game event handlers.

[issue-assigner[bot]]

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[kuv2707]

@sethdivyansh Can you take this up?

[sethdivyansh]

@kuv2707 yes sure.

[sethdivyansh]

@csoc-bot claim

[issue-assigner[bot]]

@sethdivyansh This issue has been successfully assigned to you! 🚀