Add GFP, RFP, APH support for read_cropreporter

[marcusdgriff]

Describe your changes
This PR extends read_cropreporter to detect and load GFP, RFP, and APH DAT files when available.
GFP - green fluorescent protein intensity measurements (dark + signal frames)
RFP - red fluorescent protein intensity measurements (dark + signal frame)
APH - reflectance measurements at 660 nm (red) and 730 nm (far-red)

Type of update
Is this a:

• New feature or feature enhancement

Associated issues
Reference associated issue numbers. Does this pull request close any issues?
#1862

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/mkdocs.yml
• Changes to function input/output signatures added to updating.md
• Code reviewed
• PR approved

[deepsource-io]

Here's the code health analysis summary for commits 004a6a0..4382e3b. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Python	❌ Failure	❗ 1 occurence introduced 🎯 1 occurence resolved	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%, ✅ Above Threshold	100%, ✅ Above Threshold

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