📜 Add in Readme to Performer Page

[William-McGonagle]

Idea

Right now, we have a ton of features, we just need to start documenting them. So, I've added readme files to the pages that need them. If you want to write a bit about this feature, just leave a comment and I will assign you to the issue.

For the performer, you just need to add a couple more sentences about what makes the performer special, and maybe just make it look a little prettier. You don't need to do much, but any help would be appreciated.

https://github.com/fairfield-programming/eaf-linter/tree/master/src/performer

Todo

• Add in Readme to Linter Page