For npe2 plugin, use manifest display_name for File > Open Samples

[psobolewskiPhD]

Description

This PR is the 2nd half to #5305 aiming to fix: #5304
It uses the display_name from the npe2 plugin manifest for the name of the plugin shown in the File > Open Sample menu. See:

"Hello plugin" is shown instead of napari-first-try

Type of change

• Bug-fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

References

Fixes #5304
See also the discussion here: napari/cookiecutter-napari-plugin#126
Also note that the napari-hub has started to use the display_name as well:
chanzuckerberg/napari-hub#759 (comment)

How has this been tested?

• example: the test suite for my feature covers cases x, y, and z: I added a check to existing test
• example: all tests pass with my change
• example: I check if my changes works with both PySide and PyQt backends
  as there are small differences between the two Qt bindings.

Final checklist:

• My PR is the minimum possible work for the desired functionality
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• If I included new strings, I have used trans. to make them localizable.
  For more information see our translations guide.

[codecov]

Codecov Report

Merging #5351 (050894f) into main (76a81e0) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5351      +/-   ##
==========================================
+ Coverage   89.04%   89.10%   +0.05%     
==========================================
  Files         584      584              
  Lines       49393    49394       +1     
==========================================
+ Hits        43983    44012      +29     
+ Misses       5410     5382      -28     

Impacted Files	Coverage Δ
napari/plugins/_npe2.py	92.95% <ø> (ø)
napari/plugins/_tests/test_npe2.py	100.00% <100.00%> (ø)
napari/_qt/qt_main_window.py	76.04% <0.00%> (+0.18%)	⬆️
napari/utils/theme.py	89.79% <0.00%> (+0.68%)	⬆️
napari/_qt/qt_event_loop.py	82.31% <0.00%> (+0.68%)	⬆️
napari/utils/interactions.py	77.35% <0.00%> (+2.83%)	⬆️
napari/_qt/widgets/qt_color_swatch.py	74.79% <0.00%> (+3.25%)	⬆️
napari/utils/info.py	83.33% <0.00%> (+4.44%)	⬆️
napari/_qt/__init__.py	55.17% <0.00%> (+6.89%)	⬆️
napari/_tests/test_draw.py	100.00% <0.00%> (+63.15%)	⬆️

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[DragaDoncila]

Awesome 🎉 Thanks @psobolewskiPhD!