Add accepts change condition

[Pikachu920]

Aims to add an easy to to see if an expression accepts a changemode

[Fusezion]

let me know if I'm over simplifying this but couldn't we just add ChangeMode as a enum in skript-reflect and do something like

%objects% supports %changemode% changer

if slot supports delete changer
if player's tool supports set changer

might be better to suffix modes with changer by default since idk if it'll conflict with related effects

since expressions and likely classinfos have getAcceptedChangeModes which returns a map it should be as simple as a null check

[Pikachu920]

getAcceptedChangeModes

getAcceptedChangeModes is intended for documentation purposes, not real logic