Add variants of poker

[LucasColas]

Something cool in AI and Reinforcement Learning is to have an agent that can play several games or variants. Do you think it would be possible to add other variants in this library ? Or do you think it would be possible to use this library to create others variants in other libraries ?

[SirRender00]

Hey! What other variants were you thinking? I think it makes sense to add cash game options with a rake and similar.

[LucasColas]

Yes cash game why not. But I meant Poker Ohama, No Limit head's up, heads-up flop hold’em poker (it's similar to heads-up limit Texas hold’em poker, but ends after the second betting round rather than the fourth, with only three community cards ever dealt).

[SirRender00]

I think this makes sense perhaps under a variants subpackage