Enable adaptive image display adjustments and "bring your own image processor" capabilities

[d33bs]

Description

This PR overhauls the image rendering after discovering challenges with display of images across various test datasets. We move to use a default of Contrast Limited Adaptive Histogram Equalization (CLAHE) through skimage and also provide the flexibility for a user to bring their own function to help render images, understanding there may be scenarios where automated adjustments are not sufficient. While working through this I noticed that 16-bit images were downgraded and resulted in poor quality display and as a result, refactored to remove reliance on 8-bit image conversions. This included the outline and mask overlay functions, which also were moved to the image module (they are better treated in isolation outside the CytoDataFrame class).

Closes #39
Closes #30 (and possibly related issues)

What kind of change(s) are included?

• Documentation (changes docs or other related content)
• Bug fix (fixes an issue).
• Enhancement (adds functionality).
• Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

Please ensure that all boxes are checked before indicating that this pull request is ready for review.

• I have read and followed the CONTRIBUTING.md guidelines.
• I have searched for existing content to ensure this is not a duplicate.
• I have performed a self-review of these additions (including spelling, grammar, and related).
• These changes pass all pre-commit checks.
• I have added comments to my code to help provide understanding
• I have added a test which covers the code changes found within this PR
• I have deleted all non-relevant text in this pull request template.

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[jenna-tomkinson]

LGTM! I have a few comments/questions. Thanks for your hard work on testing this and improving it! 🎉

[d33bs]

Thanks @jenna-tomkinson ! After making changes and responding to your comments I'll now merge this in.