fix: use widget from pymmcore-widgets main branch

[fdrgsp]

@ianhi linked to #264 (comment)
This PR updates napari-micromanager using the pymmcore-widgets in main branch.

[ianhi]

This raises the question of the dependency structure of the testing between these two repos. Would it maybe make more sense to do the following?

1. In regular CI use the main branch of pymmcore-widgets/pymmcore-plus
2. In testing prior to a release use the currently released versions

It seems that that would allow smooth development, but still make sure released versions are compatible.
@tlambert03 @fdrgsp

[tlambert03]

the structure I prefer is for upstream libraries to test against the main branch of their dependents with -W ignore

• useq tests main branch of pymmcore-plus
• pymmcore-plus tests main branch of widgets
• widgets tests main branch of napari-micromanager

While the downstream libraries test against the current release (NOT against the main branch).
Once the tests are in place, it's the upstream libraries responsibility to emit warnings rather than breakages, and let the downstream libraries test fail with a warning (rather than an actual error). This mimics the case that would happen with a downstream third party library we're not testing.

I know you've just jumped into an odd state, but we're actively working on this and you just caught us at a funny time.

[tlambert03]

this is a usage of a private widget in pymmcore-widgets. If there is literally no public way to access this and you need it here, then you should make it public in pymmcore-widgets

(or make some sort of public method)

[codecov]

Codecov Report

Patch coverage: 63.15% and project coverage change: -0.88% ⚠️

Comparison is base (433cb9e) 76.11% compared to head (6f4a186) 75.24%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #269      +/-   ##
==========================================
- Coverage   76.11%   75.24%   -0.88%     
==========================================
  Files          15       15              
  Lines         804      820      +16     
==========================================
+ Hits          612      617       +5     
- Misses        192      203      +11     

Files Changed	Coverage Δ
src/napari_micromanager/_mda_handler.py	72.38% <ø> (-0.61%)	⬇️
src/napari_micromanager/_saving.py	55.00% <0.00%> (-0.94%)	⬇️
...rc/napari_micromanager/_gui_objects/_mda_widget.py	77.14% <62.06%> (-11.54%)	⬇️
...c/napari_micromanager/_gui_objects/_save_widget.py	90.62% <100.00%> (ø)
src/napari_micromanager/_gui_objects/_toolbar.py	90.38% <100.00%> (ø)
src/napari_micromanager/_util.py	66.66% <100.00%> (ø)
src/napari_micromanager/main_window.py	93.05% <100.00%> (+0.09%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[tlambert03]

Hooray, seeing some green lights here