Strip original assets from game files about monikamoddev

Due to the lightweight nature of the template, a significant amount of files will either be kept in .rpa files or left out entirely. This will cut down on clutter & aid with organization in the future.

[therationalpi]

After contacting Dan directly, he seems to be fine with us hosting assets on the repo as a reference for future builds. Assets still must not be included in future releases, but scrubbing the repo's history is unnecessary.

If Team Salvato changes their mind on this in the future, we'll revisit the issue.

[therationalpi]

A branch for this is now live.

https://github.com/Backdash/MonikaModDev/tree/lightweight

This branch is based on the work for the DDLC Mod Template, and migration will consist of moving individual files from the current master to lightweight as needed.