Rename monochromatic color mode and add descriptions

[kecnry]

Description

This pull request renames the "Monochromatic" color mode option to "Color" and adds descriptions within the dropdown. Setting color_mode = 'monochromatic' from the plot options plugin API is still supported with a deprecation message.

Screen.Recording.2024-05-24.at.11.14.37.AM.mov

Change log entry

• Is a change log needed? If yes, is it added to CHANGES.rst? If you want to avoid merge conflicts,
  list the proposed change log here for review and add to CHANGES.rst before merge. If no, maintainer
  should add a no-changelog-entry-needed label.

Checklist for package maintainer(s)

This checklist is meant to remind the package maintainer(s) who will review this pull request of some common things to look for. This list is not exhaustive.

• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a milestone set? Set this to bugfix milestone if this is a bug fix and needs to be released ASAP; otherwise, set this to the next major release milestone. Bugfix milestone also needs an accompanying backport label.
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)?

[cshanahan1]

There are several notebooks (imviz_colorbar_mpl.ipynb, cubeviz_ndarray_gif.ipynb, imviz_dithered_gwcs.ipynb) that have references to 'monochromatic' that need to be updated.

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 88.70%. Comparing base (0b11723) to head (5a44dcc).
Report is 172 commits behind head on main.

Files	Patch %	Lines
jdaviz/core/template_mixin.py	50.00%	3 Missing ⚠️
...nfigs/default/plugins/plot_options/plot_options.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2894      +/-   ##
==========================================
- Coverage   88.71%   88.70%   -0.02%     
==========================================
  Files         111      111              
  Lines       17081    17086       +5     
==========================================
+ Hits        15154    15156       +2     
- Misses       1927     1930       +3     

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[cshanahan1]

There are also a few references to "monochromatic" in docs/imviz/displayimages.rst that need to be updated.

[cshanahan1]

Otherwise looks good to me and ill approve once those are fixed!

[kecnry]

@cshanahan1 - good call! Do you see anywhere else that I missed in the docs?

[cshanahan1]

@kecnry i dont think so, i dont see any more

[javerbukh]

Changing the color mode from Colormap to Color changes the background of the image viewer from white to black. Is this expected behavior?

[pllim]

Is this expected behavior?

If it isn't, I like the new behavior. Looks nicer in dark mode. 😆

[kecnry]

Changing the color mode from Colormap to Color changes the background of the image viewer from white to black. Is this expected behavior?

Do you only see that in this PR? I believe that was from upstream changes in glue by @bmorris3

[javerbukh]

@kecnry You're correct, it is also on main. In that case this looks good!