Revamp the Home page of our app to start looking like what we want

Revamp the Home page of our app to start looking like what we want

This gets rid of the original placeholder blocks which I had gotten
from a tutorial and replaces it with placeholders that look more like
what we are going to want, (a list of hunts and a button to create a
new hunt).

While doing this, we provide some utility functions to create blocks
to reduce the amount of boilerplate we need while constructing these
things.