Add: FAQ section to Artbox Readme

[investor-uyah]

Trying out Artbox, I discovered the Readme file could use some updates.

Information such as:

• how to find your output files (speech or text) locally
• or what command line tool to use - and how to install them,

are necessary but unavailable.

[shivammSharma]

hello there i would like to help in this issue