Feature: revamp and rebrand JCDP to JColor

[dialex]

⚠️ This is a MASSIVE breaking change! ⚠️

I'm renaming JCDP to JColor:

• The main problem this library solves is formatting strings (coloring text or a background). So this name is more explicit.
• There are better Java alternatives for logging, so there's no point on competing with that. Support for Printer and ColoredPrinter was dropped with this version.
• My simple and intuitive formatting API gives me a competitive advantage compared to JAnsi. So I focused in that area and now you can format strings inline colorize(string) and print them with good old System.out.print.
• As part of this refactor, I also added support for 8-bit and TrueColor colors, something JAnsi doesn't offer.

I think this refactor follows the open-source "do one thing, and do it well" philosophy, which will make it easier and lighter to use. Anyway, you can keep using the old JCDP v4 if the printers' functionality is important to you. But keep in mind I won't maintain that branch any longer.

Closes #30
Closes #33
Closes #28
Closes #27