bevy_color: Add sequence_dispersed to Hsla, Lcha, Oklcha

[bushrat011899]

Objective

• Fixes Add a color_from_index randomized color palette generator #12170

Solution

• Moved the existing color_from_entity internals into Hsla::sequence_dispersed which generates a randomly distributed but deterministic color sequence based.
• Replicated the method for Lcha and Oklcha as well.

Examples

Getting a few colours for a quick palette

let palette = Hsla::sequence_dispersed().take(5).collect::<Vec<_>>();
/*[
    Hsla::hsl(0.0, 1., 0.5),
    Hsla::hsl(222.49225, 1., 0.5),
    Hsla::hsl(84.984474, 1., 0.5),
    Hsla::hsl(307.4767, 1., 0.5),
    Hsla::hsl(169.96895, 1., 0.5),
]*/

Getting a colour from an Entity

let color = Oklcha::sequence_dispersed().nth(entity.index() as u32).unwrap();

Notes

This was previously a private function exclusively for Entity types. I've decided it should instead be public and operate on a u32 directly, since this function may have broader uses for debugging purposes.

[pablo-lua]

I think this can be simplified in some kind of trait in the future, but I'm not sure if this is a good idea. But for now, all good.