[Documentation:Plagiarism] Add Lichen test docs (#359)
[Documentation:Plagiarism] Add Lichen test docs (#359)

* First draft

* Add note about where tests must be run and provide a link to the general testing docs

* fix path

* Changed the wrong link smh
Submitty/submitty.github.io,Submitty/submitty.github.io,Submitty/submitty.github.io,Submitty/submitty.github.io