Fully configurable playtime + joindate based namecolor plugin for 1.19

In order to get access to any given name color, both the joindate requirement (JD min.) as well as the playtime requirement (PT min.) have to be fulfilled. The playtime numbers here are measured in hours, whereas the joindate is either measured in days, or a certain date, where the player must have joined before it.

color	PT min.	JD min.	example	hex code
dark_red	384	365		#AA0000
red	64	32		#FF5555
gold	48	24		#FFAA00
yellow	96	64		#FFFF55
green	48	32		#55FF55
aqua	424	365		#55FFFF
dark_aqua	528	365		#00AAAA
blue	16	8		#5555FF
dark_purple	32	32		#AA00AA
white	2	none		#FFFFFF
gray	none	none		#AAAAAA
dark_gray	264	128		#555555

modifier	PT min.	JD min.	example	sample command
bold	384	365
italic	428	564
gradient	400	420		/nc gradient dark_red dark_blue
flag	520	664		/nc flag denim white dark_red
alternating	464	528		/nc alternating black white

Donators may get special perks for namecolor selection, such as additional namecolors not every other player can have, or an instant access to colors that would require some PT or JD.

color	example	hex code
light_purple		#FF55FF

modifier	example
italic