Initial attempt to create base GUI classes

[dalthviz]

Description

Create a set of base GUI classes so the logic implement can be reused while also keeping an implementation for napari

Part of #59

Notes

• Although more work needs to be done here (somehow improve coverage/add test to the base classes for example). Marking as ready to review to get some feedback on the approach used here. Let me know what you think @jaimergp !

[codecov]

Codecov Report

Attention: Patch coverage is 91.97397% with 74 lines in your changes missing coverage. Please review.

Project coverage is 92.38%. Comparing base (dbcd362) to head (e5c1e63).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
napari_plugin_manager/base_qt_plugin_dialog.py	91.77%	72 Missing ⚠️
napari_plugin_manager/qt_plugin_dialog.py	95.65%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #113      +/-   ##
==========================================
- Coverage   93.54%   92.38%   -1.16%     
==========================================
  Files          10       11       +1     
  Lines        1813     1931     +118     
==========================================
+ Hits         1696     1784      +88     
- Misses        117      147      +30     

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[jaimergp]

Is this just for the types? Should it be guarded behind TYPE_CHECKING? Not saying that's the best practice, I honestly don't know, but it was weird to see the same schema in this protocol class and also in the named tuple below.

[jaimergp]

What is this for? I think the base class should be very well documented so downstream users know what to subclass.

[jaimergp]

As a rule of thumb, if the base class method is raising NotImplementedError, I think we should explain what's the expected behavior of this method with a docstring.

[jaimergp]

These two globals are also available in the base module. Shall we delete here?

[jaimergp]

I like it a lot @dalthviz. Just added some comments about documenting the pieces that are meant to be subclassed. The base class docstring should detail how to get to a functional plugin manager in the subclass; e.g. "make sure to subclass all the methods that raise NotImplementedError, details are available in each method docstring".