[Feature] Adds 4 more team colors

[Reed022]

Purpose

This adds 4 new possible colors for teams: Yellow, cyan, light_blue, and dark_gray. This also changes the team icons within the Team Options menu to each have a different color. Previously, similar team colors (such as "Green" and "Dark_Green") shared the same color icon. Finally, I moved a few message strings to the proper message file for consistency sake.