Launch backend from frontend

[skywolf829]

For convenience, launching the backend code from the frontend (before connected to anything) could save users time.

When the user launches the backend, it should attempt to connect to it immediately and tell the user when everything is ready.
It should create a new process for the backend to run in that should automatically be killed if the frontend ever goes down.

[skywolf829]

Would require a persistent server that could spin up new GPUs for rendering. Might be possible through collab/kaggle or something to get a free GPU up? Might require users to sign in with their own account (google, apple, etc) and then use collab API such that they can each have a GPU. Closing here, but may re-open in backend eventually.