Add plot ids to debug images we create

[HaleySchuhl]

Describe your changes
Add plot labels, which are detected from a given geojson or are numerated with the analysis label parameter as a base name. Also change the plot boundary lines to be blue, rather than red, since it's more colorblind friendly.

• Should we wrap the labels in pcv.params.verbose logic?

November 7th updates: combine the ability to use pcv.params.sample_label AND the labels embedded within the shapefile shapes. Also, revert back to 0 indexed auto-ids since it's more consistent with how plots are labeled in QGIS.

Type of update
Is this a:

• feature enhancement
• bugfix to the outputs.observation sample & label behaviors

Associated issues
Reference associated issue numbers. Does this pull request close any issues?

Additional context

• implements the plotting helper function in all analysis functions

For the reviewer
See this page for instructions on how to review the pull request.

• PR functionality reviewed in a Jupyter Notebook
• All tests pass
• Test coverage remains 100%
• Documentation tested
• New documentation pages added to plantcv-geospatial/mkdocs.yml
• Changes to function input/output signatures added to changelog.md
• Code reviewed
• PR approved

[deepsource-io]

Here's the code health analysis summary for commits 79c39da..9755413. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Python	✅ Success		View Check ↗
Test coverage	✅ Success		View Check ↗

Code Coverage Report

Metric	Aggregate	Python
Branch Coverage	100%	100%
Composite Coverage	100%	100%
Line Coverage	100%	100%
New Branch Coverage	100%	100%
New Composite Coverage	100%	100%
New Line Coverage	100%	100%

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