implement manager view and dialog

[alessandrofelder]

Description

What is this PR

• Bug fix
• Addition of a new feature
• Other

Why is this PR needed?
We'd like to have a separate table view that allows updating and downloading of atlases via the BrainGlobe atlas API

What does this PR do?

This PR

• implements this table view
• does not add it to a widget - will follow in separate PR
  • for now, manual visual inspection of the class can be done by executing the python script below

from brainrender_napari.widgets.atlas_manager_view import AtlasManagerView
from qtpy.QtWidgets import QApplication

app = QApplication([])
view = AtlasManagerView()
view.show()
app.exec()

Some refactoring was needed so

• different views can have different tooltips
• different views can display a formatted atlas name in their tooltips without code duplication

References

Another step towards closing #21

How has this PR been tested?

New tests added to cover

Is this a breaking change?

Yes, AtlasTableModel constructor now takes an argument view_type, which specifies the class whose get_tooltip_text function it should call.

Does this PR require an update to the documentation?

If any features have changed, or have been added. Please explain how the documentation has been updated (and link to the associated PR). See here for details.

Checklist:

• The code has been tested locally
• Tests have been added to cover all new functionality (unit & integration)
• The documentation has been updated to reflect any changes
• The code has been formatted with pre-commit

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ebf43dc) 97.72% compared to head (f550c72) 98.06%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #124      +/-   ##
==========================================
+ Coverage   97.72%   98.06%   +0.34%     
==========================================
  Files           9       11       +2     
  Lines         396      466      +70     
==========================================
+ Hits          387      457      +70     
  Misses          9        9              

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[IgorTatarnikov]

Looks good 👍! I have a few small comments but nothing that needs to be urgently addressed.

The tooltips feel a bit sluggish, especially when moving the mouse within the same row. Is there any way to add a small delay before the tooltip is rendered?