Create separate home screens per user type

[CodyRichter]

Right now, there is only one home screen shown to all users, and depending on the user type there is either extra/not enough information. As there are three user types: [admin, researcher, investigator] each should have their own version of the home screen.

Optional: Allow toggling between different views depending on permission hierarchy (admin > researcher > investigator)

The views should contain the following features UI features:

Admin:

• Add permissions to users via username and role selector dropdown
• Remove permissions from users via username (auto populating current role)
• List all users of each role type in a list/table

Researcher:

• Create and view API keys for use with microservices

Investigator:

• View number of pending jobs that the user has submitted
• View charts on image statistics. (example: images uploaded per day, images matching model criteria, etc...)