Integrate e-paper display into user interface about frosti HOT 1 CLOSED

Create a GenericGraphicInterface that handles drawing the graphics and takes events on button inputs. A derived class can later specialized w/ the e-paper display and the GPIO buttons. This service should also have a method to scrape the latest display image so the API service can put up a simple webpage to show the device and present the buttons. This should just completely replace the character-based stuff we've been doing -- just need to commit to it.

An image has been added to the root repo we can use to show the user what the device currently looks like. Now that we're pretty committed to the current hardware design, we could have the generic service know all about the physical device and draw images of it? Just want a web-based development experience so nobody needs to be next to a physical device to work. Need to make sure we don't make things "uselessly generic!!"

from frosti.