Surrender Button added

[hars-21]

PR Description 📜

Added a surrender button which when clicked asks for confirmation and if it confirmed. It removes the current player who surrendered.
If only 2 people are playing then the other becomes the winner
else the game continues.

Fixes #560

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[hars-21]

@ayush-t02 Please merge my previous PRs before merging this one. #700 #684