Support white neopixel strings

[oresk]

Support white neopixel strings

This change allows white single color neopixel cob strips to work like this one https://vi.aliexpress.com/item/1005005946691268.html?spm=a2g0o.order_list.order_list_main.10.57261802SVIh97&gatewayAdapt=glo2vnm

Tested it on my setup, and it works as expected.

I have updated the relevant documentation.

The new check allows you also to enter color_order of one or two characters. This allows to enter just W and then have all the white subparts adresable on their own.

Signed-off-by: Lovro Oreskovic [email protected]

[flowerysong]

This validation is insufficient, it allows strings like RRRRR.

[oresk]

I was certain that I saw other single color cob strips on aliexpress, but I can't seem to find them now :-)
What do you think the best approach here would be?

[flowerysong]

I'm not sure why you're bringing up single colors. The best approach would be to perform sufficient validation so that strings like RRRRRRRRRRRRRRRRRRGBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB aren't accepted.

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