Make the `UNO` button functioning

[kuv2707]

Description

The UNO button presently in the game page is dummy. The button should trigger the ANNOUNCE_UNO event. Use channel.triggerEvent for triggering events with appropriate payload.

[issue-assigner[bot]]

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[draunger]

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

[draunger]

@csoc-bot abandon

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[Abhishek-Punhani]

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@Abhishek-Punhani This issue has been successfully assigned to you! 🚀