Tracking for Epsilon rewrite

[DarkGuy10]

This issue will track immediate changes for the Epsilon rewrite.

Major changes in this rewrite:

• Migrate backend to discord.js v14
• Migrate from CRA to Next.js
• Migrate codebase to Typescript + SASS
• Implement routing for easier page handling on frontend
• Add Redux for better data flow and state management
• Fix TooltipManager and ContextMenuManager api into wrapper-like components

[DarkGuy10]

9cd2bb8 finishes task 1

[DarkGuy10]

🚧 Prepsilon

Skeleton repo for the next rewrite.
This is still work in progress, but any criticism/advice is more than welcome ✨
Oh btw, we're switching the codebase to Typescript + Sass 🍷