File name inconsistency

[H4ppy-04]

A lot of the files are named inconsistently.

• some spaces are substituted with hyphens, and others with underscores.
• there are files that have just a completely random ID attached to the end of them such as oskr_the_primeagen_6371be34-bd8a-4643-82c1-d480ec36ea29.png

Furthermore, some of the file names are just - to be blunt - completely confusing.

For example, I have no idea what the difference between these files would be (without actually opening them up and looking at them):

• grung-green-yellow-refd.png
• green-green-red.jpg
• green-eyes.jpg
• green-brown-yellow.jpg

I plan on creating a PR that:

1. Creates a uniform file naming standard. I'm leaning towards dashes.
2. Rename files to match their contents. Trying to keep within the original name convention by not making the file name too verbose or descriptive in its nature.