feat: use all pymmcore-widgets

[fdrgsp]

First PR to break up #214.

In this PR, all the QtWidgets used in napari-micromanager are replaced by pymmcore-widgets (or pymmcore-widgets subclass) + fix/update tests.

[codecov]

Codecov Report

Base: 84.74% // Head: 86.11% // Increases project coverage by +1.37% 🎉

Coverage data is based on head (4ce92c2) compared to base (0a6d3a7).
Patch coverage: 92.82% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #215      +/-   ##
==========================================
+ Coverage   84.74%   86.11%   +1.37%     
==========================================
  Files          16       12       -4     
  Lines        1796      922     -874     
==========================================
- Hits         1522      794     -728     
+ Misses        274      128     -146     

Impacted Files	Coverage Δ
micromanager_gui/_gui_objects/_xyz_stages.py	61.97% <0.00%> (ø)
micromanager_gui/_saving.py	68.75% <59.25%> (-0.95%)	⬇️
micromanager_gui/_gui_objects/_mda_widget.py	92.04% <92.04%> (ø)
micromanager_gui/main_window.py	84.19% <94.18%> (+5.41%)	⬆️
...anager_gui/_gui_objects/_sample_explorer_widget.py	94.21% <94.21%> (ø)
micromanager_gui/_gui_objects/_mm_widget.py	97.19% <97.61%> (+0.25%)	⬆️
micromanager_gui/_gui_objects/_shutters_widget.py	100.00% <100.00%> (+18.51%)	⬆️
micromanager_gui/_gui_objects/_tab_widget.py	100.00% <100.00%> (+6.84%)	⬆️
micromanager_gui/_mda_meta.py	100.00% <100.00%> (ø)
micromanager_gui/_util.py	75.00% <100.00%> (+20.65%)	⬆️
... and 2 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[tlambert03]

lots of stuff here, great to remove all this code.

As discussed, will be great to get past the big refactor, then revisit all this stuff with a fine-toothed comb, adding tests, and refactoring out stuff.

thanks!