Enhancement: Add Character Variations for the Sake of Organization

[DETOURD3]

Issue Checklist

• I have properly named my enhancement
• I have checked the Issues/Discussions pages to see if my enhancement has already been suggested

What is your suggestion, and why should it be implemented?

With more characters to eventually come to Funkin', it can cause clutter in menus such as the chart editor to look for a specific player or opponent. The current version of FNF uses multiple character files to distinguish between variations of one specific character. One example of this is Pico, who has his normal opponent version, his playable version, week 5 version, and week 2 version. As more weekends and styles of Pico to come, this can cause clutter for modders, which character variations solve. This would work similar to the variations for songs, and it should be possible to switch between variations in an updated version of the character editor.