Ability to import settings

[MangelMaxime]

When testing or reporting issues, I often needs to manually set the setting on fantomas-tools which is error prone and not easy to do.

It would be nice, if I could copy/paste my existing configuration into fantomas-tools to import it.

[nojaf]

I'm not 100% in favour of this.
It is preferred that people reproduce the problem with a limited amount of settings.
Sometimes the problem exists with the default settings and the user's actual settings only add noise and throw you off guard.

[MangelMaxime]

Another usage is also to make it easier for people to adapt their configuration.

For example, if something is not working the way I want it, the browser often provide a faster feedbacks loop. But I have the initial cost of setting up my current settings in it.

[nojaf]

Still seems like a first-world problem to me 😸.
I would review your PR when I see one, but no promises...

[sergey-tihon]

Agree with @MangelMaxime here, also miss this feature.

In my workflow, first I try to reproduce thee bug and then minimize code sample and localize the bug. The hardest part is to sync configuration. (I am glad that I am not the only one who do not like defaults and official style guide 😝)

With current Setting panel also not clear what was the default value and what modified in my current version (when I clicked on several switchers). From UX viewpoint I would prefer Settings panel with 2 modes (visual and textual). Textual is editable, support copy-pasting and with support of config minimization (remove setting that set to default value)