PSA: Don't use next in loops for performance

[ccuser44]

It used to be that next would make loops more performant.

However with Luau this is no longer the case and the opposite is true.

Use ipairs() for arrays and pairs() for dictionaries.

Also next is less idiomatic

Basically use ipairs() unless it has custom indexes then use pairs()

For normal tables use ipairs()

[Sceleratis]

Yeah, I've known for a while but kept using them out of habit/style preferences but have started moving away from using them.