feat: replace menu with QToolBar

[fdrgsp]

This PR replaces the menu with a QToolBar.

Some of the pymmcore-widgets are now directly added to the QToolBar, other can be called with QPushButtons added to the toolbar.

The creation of the QToolBar and all the QPushButtons/pymmcore-widgets connections have been moved from main_window.py to a single file called _toolbar.py.

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[codecov[bot]]

Codecov Report

Base: 82.27% // Head: 83.02% // Increases project coverage by +0.75% :tada:

Coverage data is based on head (3890b48) compared to base (ce156cd). Patch coverage: 95.85% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #221 +/- ## ========================================== + Coverage 82.27% 83.02% +0.75% ========================================== Files 13 13 Lines 880 984 +104 ========================================== + Hits 724 817 +93 - Misses 156 167 +11 ``` | [Impacted Files](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus) | Coverage Δ | | |---|---|---| | [src/napari\_micromanager/\_\_main\_\_.py](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus#diff-c3JjL25hcGFyaV9taWNyb21hbmFnZXIvX19tYWluX18ucHk=) | `0.00% <0.00%> (ø)` | | | [src/napari\_micromanager/\_gui\_objects/\_toolbar.py](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus#diff-c3JjL25hcGFyaV9taWNyb21hbmFnZXIvX2d1aV9vYmplY3RzL190b29sYmFyLnB5) | `96.25% <96.25%> (ø)` | | | [src/napari\_micromanager/main\_window.py](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus#diff-c3JjL25hcGFyaV9taWNyb21hbmFnZXIvbWFpbl93aW5kb3cucHk=) | `87.45% <100.00%> (+0.19%)` | :arrow_up: | | [...ari\_micromanager/\_gui\_objects/\_snap\_live\_widget.py](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus#diff-c3JjL25hcGFyaV9taWNyb21hbmFnZXIvX2d1aV9vYmplY3RzL19zbmFwX2xpdmVfd2lkZ2V0LnB5) | `0.00% <0.00%> (-100.00%)` | :arrow_down: | | [...pari\_micromanager/\_gui\_objects/\_shutters\_widget.py](https://codecov.io/gh/pymmcore-plus/napari-micromanager/pull/221/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus#diff-c3JjL25hcGFyaV9taWNyb21hbmFnZXIvX2d1aV9vYmplY3RzL19zaHV0dGVyc193aWRnZXQucHk=) | `100.00% <0.00%> (+100.00%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pymmcore-plus)

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[tlambert03]

@fdrgsp ... it seems like you saw https://github.com/fdrgsp/napari-micromanager/pull/33 ... but didn't merge it. how come?

[tlambert03]

can you change all of those strings to MDI6.___ and remove the getattr call, as in my PR?

[fdrgsp]

@fdrgsp ... it seems like you saw fdrgsp#33 ... but didn't merge it. how come?

I looked at it on the phone and deleted the email and I didn't find it anymore :joy: I thought you added it in this PR and did't realize it was on mine, sorry

[fdrgsp]

@tlambert03 do you like that when we add the widgets they are already docked? What about docking only the mda and explorer and leave the other undocked when created?

[tlambert03]

yeah, I do like it, for everything but the property browser... but lets handle special casing in a followup pr

[fdrgsp]

good stuff. i'm inclined to merge as is, and then do some refactoring later today. sound good?

sounds great!!!