[file]: Move utils file to dir

cogs/_colors.py

@@ -1,15 +0,0 @@
-from random import choice
-
-from discord import Color
-
-light_colors = [
-    Color(0xaaffaa),
-    Color(0xF9FFAA),
-    Color(0xFFAAAA),
-    Color(0xFFCCAA),
-    Color(0xAAFFE3),
-    Color(0xAAB0FF),
-    Color(0xFFAAF7)
-]
-
-def choise_light_color(): return choice(light_colors)