"Guide to MaveDB Documentation" on Landing Page

[bencap]

Additional documentation for first time users that describes the site, what sorts of data exists here, and how they might use it. As part of this task, we might consider adding links to user specific guides. For instance:

"“I am a scientist who needs to upload a MAVE dataset”
“I am a scientist who wants to explore existing MAVE datasets”
“I am a clinician who wants to look at MAVE data for a variant I am investigating”