UI to run MoE inference and Base Model inference side by side

[lpietrobon]

work on this started already at https://github.com/fearnworks/hydra-moe/tree/webui_prototype

Changes centered around :
https://github.com/fearnworks/hydra-moe/blob/webui_prototype/moe.py
https://github.com/fearnworks/hydra-moe/blob/webui_prototype/server.py

[fearnworks]

I am updating the logic from the prior merge to work with the new alpha branch. New PR incoming tomorrow.