Add Documentation Explaining config-stt-en_fr-hf.toml Params

[B-Ismail]

Hi! First, thanks for the great work on this project.

It would be really helpful if you could add a section in the documentation explaining the different variables and parameters inside the config-stt-en_fr-hf.toml file—what each one does, and how they affect the system.

Having a clear reference would make configuration much easier for developers.

Thanks in advance!

also noticed in this file theres
log_dir = "$HOME/tmp/tts-logs"
instance_name = "tts"

did you guys mean
log_dir = "$HOME/tmp/stt-logs"
instance_name = "stt"

since it's the stt config file?