[Game] Add all-in functionality / side pots

[monicanagent]

There is currently no all-in action. The only similar action is for a player to bet the maximum amount which is equal to the maximum amount of chips that any player at the table can bet. However, this is insufficient for all-in bets for games with more than 2 players as there may be some players that can match an all-in while others can't.

All-in betting should follow the rules defined Hoyle's Poker Rules: https://www.hoylegaming.com/rules/showrule.aspx?RuleID=222