[Suggestion] FlexGen support

[RyutaItabashi]

This works brilliantly with webui, however with my limited computational resources I could not get some of the heavier model to work.

So I would really appreciate it if there's any implementation to use FlexGen with this webui. Sorry if there's already any ways to to this.

Thank you!

[Tps-F]

I'll give it a try once my final exams are over! Thanks for your valuable input!