Improved birefringence overlays

[talonchandler]

This PR makes the following improvements to the birefringence overlays:

• overlays are correctly scaled, and a warning appears if the input data's scale is different from the reconstruction scale. This fixes [BUG] GUI-generated layers are incorrectly scaled #418 and replaces Do not convert scale metadata from micromanager #419.
• overlays are calculated lazily from the most recently added "Retardance*" and "Orientation*" layers via dask arrays. This is enabling for datasets with many timepoints (e.g. recent mantis datasets) where calculating the complete birefringence overlay would crash napari with OOM.
• an "overlay retardance maximum" slider is now on the visualization tab. Lazy computation enables live updating of the overlay.

The demo gif below demonstrates the main features. Even though I'm only showing a small region, the overlay is being computed for a 2048 x 2048 FOV---the largest we typically use. I estimate the lag time to be 0.1-0.2 seconds, which is noticeable but worth it IMO. You can also "hide" the layer to stop the lazy computation. @ziw-liu and I have discussed plans for 1.0.0 that will allow these computations to happen on a separate thread.

Thanks @ziw-liu for your help with this.

[codecov]

Codecov Report

Merging #426 (7bd38b7) into main (bbf3502) will decrease coverage by 0.08%.
The diff coverage is 0.00%.

❗ Current head 7bd38b7 differs from pull request most recent head e96576f. Consider uploading reports for the commit e96576f to get more accurate results

@@           Coverage Diff            @@
##            main    #426      +/-   ##
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- Coverage   8.66%   8.58%   -0.08%     
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  Files         26      26              
  Lines       4443    4484      +41     
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  Hits         385     385              
- Misses      4058    4099      +41     

Files Changed	Coverage Δ
recOrder/acq/acquisition_workers.py	0.00% <0.00%> (ø)
recOrder/calib/calibration_workers.py	0.00% <0.00%> (ø)
recOrder/io/utils.py	0.00% <0.00%> (ø)
recOrder/plugin/gui.py	0.00% <0.00%> (ø)
recOrder/plugin/main_widget.py	0.00% <0.00%> (ø)

[deprecated-napari-hub-preview-bot]

Preview page for your plugin is ready here:
https://preview.napari-hub.org/mehta-lab/recOrder/426
Updated: 2023-08-24T18:46:05.919001

[talonchandler]

Thanks for your help here @ziw-liu!