Python package documentation

[eliamazzon]

Without consistent documentation is pretty hard to use the package
Mimic 3 is pretty impressive but without documentation is very hard to use in other projects.

There's a need for python Mimic 3 documentation
This would help other developers integrate the package in projects that right now have to rely on proprietary TTS engines like GTTS or sapi5. Mimic 3 is probably the frontier in the privacy-focused offline TTS world and it would receive wider adoption and more contributions if it were well-documented and easier to use.