Make NonZero::new, NonMax::{new, get} a const fn

Added

• Implement Display for NonZero, NonMax (svrxxntk)
• Implement BitOr for NonZero, BitAnd for NonMax (rrlpzwum)

Changed

• Mark NonZero::new, NonMax::{new, new_unchecked, get} as const fn (vnvwkvzp)