Feature request: Tuning parameters in Frontend

[codefaux]

Hi there! Fantastic project, great work.

My request is simple; I'd like to be able to change the top_k, top_p, cond_scale, and temperature (and possibly the ability to provide the random seed) from the frontend. I like to fiddle with those in the Notebook version, and I think exposing those knobs could improve understanding as well as results.