[PYPI] Flesh out readme and add long_descrition

[emphasize]

I guess its time to up the ante.

At least the "organs" of Ovos should get the special treatment (should referencing each other)

[JarbasAl]

let's do a final pass over the readmes before closing this issue

linking relevant docs sections (tech manual + community + docker where applicable) and companion repos

• bus + bus-client
• core
• gui
• listener
• audio
• media (soon)
• workshop
• opm
• PHAL
• utils

[mikejgray]

I'm pretty sure I got all the missing sections in setup.py for all those repos, but as we review the READMEs please double check 🙂