NEW FEATURE: project explorer

[MuellerSeb]

Summary

A project explorer like in spyder next to the psy-view app.

Reason

It would be nice to have a project explorer, that shows a certain directory-tree next to psy-view, to easily switch between files.

Examples

[Chilipp]

True, good idea! If you don't mind, I transfer this issue to psyplot-gui. It makes sense to implement this as a plugin for the general GUI and it can then be easily implemented for psy-view as well, as psyplot-gui is a dependency anyway.

[MuellerSeb]

👍