fix setup dev

[MaxOstrowski]

The dev environment should be able to use the formatters.

[rkaminsk]

Is there any need to add doc? Sphinx is a rather large dependency that might conflict with the project itself. We can add format variant though.

[MaxOstrowski]

If you are developing, don't you have to maintain the documentation of the changed code too ?
Don't have a strong opinion about it though. Personally sphynx is way too big for my liking and I would replace it completely with something more lightweight.

[rkaminsk]

If you are developing, don't you have to maintain the documentation of the changed code too ? Don't have a strong opinion about it though. Personally sphynx is way too big for my liking and I would replace it completely with something more lightweight.

Sure, but we have a nox session for this. The idea for the dev environment was more to have the tools available in the editor you are using.

[MaxOstrowski]

Makes sense then.