Quality of life improvements

[rellafella]

• add logos
• update readme
• Add some js doc types where appropriate
  • this can require a bit of refactoring in places
  • just started for now in index.js
• Format flake file using nixfmt

[zackad]

You add lots of logo, but I don't see they being used other than wide-*.svg variant. Is this really necessary?

[rellafella]

This is most definitely a "rather have them and not need them, than need them and not have them approach" I can assure you that you do not want to be re-making these logos as it is a pretty painstaking process.
I have used the prettier-logo repo as a basis for this decision making.
Is it necessary, absolutely not. Is it nice to have to add some polish to areas as this plugin evolves, I would think so.

[zackad]

Thank you.