Add functionality to get a random protein

[bolantej]

Currently in the backend protein.py file there is a router ("protein/random") to find a random protein, however this is not implemented in the front end and currently does not do anything. We should add the corresponding code in the front end to make this functional

[chasec22]

This is for the two random proteins that pop up on the home page. We could possibly add a new link that could bring you to a random protein