Fixed a game sync issue in tournament

[MehrinFirdousi]

• Fixed issue in tournament where one player having slow connection causes the match to start at different times for both players.
• Fixed by adding a new socket event gameReady to supplement the ready button's syncing behavior
• Expected behavior after the fix: After both players click ready, if one player's game loads way faster than the other, they will wait until the other user has caught up before the game starts.