Voice message transcription feature

[navopw]

Already working on feature/whisper branch.

• We need some documentation in docs/whisper.md on how to install whisper.
  • Windows, Linux, Mac
• Needs better code structure, i just drafted it
• Needs more testing

[andrewssobral]

@navopw This would be really cool!

[navopw]

Released it, have fun.

Create issues on errors.