Ability to change the amount of carried trinkets and cards/pills/runes

[Foks256]

There currently isn't any way to increase the carrying capacity of Trinkets and Cards/Pills/Runes without giving the player one of the items that allow this, which are Mom's Purse, Polydactyly, Starter Deck and Little Baggy.

Could be a callback or a player function, but I think callback would be better.