Refactor rulesets into smaller composable operations
In order to mix up the functionality from different rulesets like Solo, Royale, etc. the code in these classes needs to be broken up into small functions that can be composed in a pipeline to make a custom game mode.
* move hazard damage into StandardRuleset
* OutOfBounds -> Hazards
* remove "out of bounds" in comment
* add cases for eating food to hazard damage test
