Hidden consumables polling functions

[nh6574]

Adds SMODS.poll_soul(args), function to poll hidden consumables that returns the key, can return nil if none is selected. It takes the following arguments:

• set: string set to check if the hidden consumable should replace.
• key?: string random seed key
• mod?: number multiplies the hidden consumable rates
• guaranteed?: boolean always returns a key (if there's a valid consumable)
• allow_duplicates?: boolean act as if Showman is present
• ignore_vanilla?: boolean ignores Soul and Black Hole

Also SMODS.get_soul_rate(consumable, set) that gets the rate of a given consumable (0 if none, nil if invalid). Which also uses G.GAME.soul_mod to modify the rate globally.

Consumables now additionally take a table of sets for soul_set and a function for soul_rate.

As a bonus, now modded hidden consumables can appear even if The Soul is banned (and respect their own bans).

There's some weird jank around Soul and Black Hole that I decided not to touch much to not mess with vanilla functionality so they don't follow the same logic as the rest (hence ignore_vanilla). I'm also bad at math at 1 AM so I might have messed with some of the rate calculations in a way I don't realize.

Additional Info:

• I didn't modify api's or I've made a PR to the wiki repo.
• I didn't modify api's or I've updated lsp definitions.
• I didn't make new lovely files or all new lovely files have appropriate priority.