Extend to MacOS target

[MartinDelille]

Is your feature request related to a problem? Please describe.

I prefer using MacOS than iOS to use a bigger screen and a proper keyboard.

Describe the solution you'd like

A MacOS application

Describe alternatives you've considered

Keeping using my Gmail account configured with Mail (and keep working for google for free 😢 ).

Additional context

I cloned the repository and started changing the repository but I have some issue with the provisional profile.