Add table to README/wiki with bulb models and known working color format

[mxwlsavard]

How would you feel about adding a table with bulb models and what color formats (rgb, ct, xy) work with them that people could contribute too? Personally I've checked this repo and the thread on the HA forum probably a half dozen times to see if someone has listed what color format works best for my bulbs (they usually haven't or I haven't found them). This could be super helpful.

[claytonjn]

Sure, I think that would be good for the Wiki.