Create user generator backend and frontend landing page

[Reckless-Satoshi]

Create user generator page that will act as landing page.

In the first visit, the front end generates a high-entropy token, the backend replies with new user credentials a Nickname and a RoboHash avatar.

The user can either accept the given "Robosat" avatar (button It's cool!), generate a new one (button Nah, give me another, or log into existing one (button I have my own). It's cool takes the user to /home/, where he is presented with Buy/Sell option (or altenatively make/take options depending on site structure).

• Create API endpoint UserGenerator() (view) that handles user creation from request token. Replies with a nick and avatar and keeps the user logged in.
• Validate the token is high entropy ( >128 bits >0.7 shannon).
• Create API endpoint UserDelete() deletes current logged in user and creates a new one if a high-entropy token is given.
• Create frontend component
• Implement client-side high entropy token generator
• Build forms and routing