add(colours): Ports matrix/colormate stuff from CHOMP

Original PR: https://github.com/CHOMPStation2/CHOMPStation2/pull/6159
Original Author:
https://github.com/BlackMajor

code/modules/mob/mob_helpers.dm

@@ -85,10 +85,12 @@
 /proc/is_admin(var/mob/user)
 	return check_rights(R_ADMIN|R_EVENT, 0, user) != 0
 
-
+/**
+ * Moved into its own file as part of port from CHOMP.
+ *
 /proc/hsl2rgb(h, s, l)
 	return //TODO: Implement
-
+*/
 /*
 	Miss Chance
 */