Use `MaybeUninit` instead of Option

Since the generated code ends up doing unwrap_unchecked anyways, consider using MaybeUninit instead of Option as it won't add an unnecessary enum tag on every field (Saving space)

[maminrayej]

Hi :)
You're right. I'm currently working on some new features and a refactor in the refactor branch. I'll add your suggestion to it before merging it into main.