Add to_roi to InteractiveShapes

[joshqsumner]

Describe your changes
Changes to_roi to use a source argument instead of a geojson argument. This will help avoid the pattern described in #189 and seen in most of our geospatial tutorials where you convert_x to write it out to a geojson from your viewer then read the geojson in to get an ROI. Once that feature exists it let us add a method for interactiveshapes.to_roi to do the conversion directly from the viewer.

Type of update
This is a new feature.

Associated issues
Closes #189

Additional context
Will require updating tutorials, is not part of the paper, and is a breaking change.

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]

DeepSource Code Review

We reviewed changes in 0afb350...0bd2c14 on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene   Coverage

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
Python		Sep 23, 2026 8:37p.m.	Review ↗
Code coverage		Sep 23, 2026 8:38p.m.	Review ↗

Code Coverage Summary

Language	Line Coverage (New Code)	Line Coverage (Overall)
Aggregate	100%	100%
Python	100%	100%

➟ Additional coverage metrics may have been reported. See full coverage report ↗

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