Expand docs for Box{2,3}D::{contains,contains_inclusive,from_points} #132

Job	Run time
Check code formatting	4s
Linux (1.56.0)	2m 0s
Linux (stable)	12s
Linux (beta)	18s
Linux (nightly)	18s
Linux (--features serde, 1.56.0)	1m 57s
Linux (--features serde, stable)	18s
Linux (--features serde, beta)	22s
Linux (--features serde, nightly)	21s
Linux (--no-default-features --features libm, 1.56.0)	1m 49s
Linux (--no-default-features --features libm, stable)	13s
Linux (--no-default-features --features libm, beta)	20s
Linux (--no-default-features --features libm, nightly)	16s
Linux (stable, --features mint)	14s
Linux (stable, --features bytemuck)	21s
Linux (stable, --features arbitrary)	15s
Linux (nightly, --features unstable)	16s
Linux (nightly, --features unstable,serde)	22s
Result	0s
	9m 56s

Provide feedback