Add the option to read thermal images

[AFis-245]

Is your feature request related to a problem? Please describe.
So far you have to convert thermal images (from a FLIR camera) to csv format in order to read in the actual temperature information saved in the image.

Describe the solution you'd like
It would be nice to have the option in readimage() for a thermal mode that can easily read in the thermal data.

Describe alternatives you've considered
Currently I am using the flir_convert function in plantcv-extras to convert thermal images to csv files. This adds another step to the pipeline and creates an additional file that needs to be stored for each image. Adding it to readimage would simplify this process and avoid potential dependency conflicts or exiftool issues.

Additional context
https://github.com/danforthcenter/plantcv-extras/tree/convert-thermal-jpg-to-csv

[nfahlgren]

Let's add flyr (https://pypi.org/project/flyr/) as a new dependency and enable readimage to directly read FLIR thermal JPG images

[AFis-245]

On the branch I added the code to read thermal jpg with flyr to the readimage function, a new test and updated that part of the documentation. I put flyr as a dependency into pyproject.toml file for now but I know you said you wanted to make it a conda package so we can change that. As far as I could tell the tests ran fine locally but I would have to double check it.

[nfahlgren]

I think that was in the plantcv-extras repo though, we could add it directly here in the main plantcv repo now I believe.

[AFis-245]

No the one in plantcv-extras is just the renaming function and the conversion that still uses flirextractor. The branch I am talking about should be attached to this issue and is in main plantcv.

[nfahlgren]

Ah gotcha, I see it. Thanks!

[nfahlgren]

Looks pretty ready to start a Pull Request if you want to open that!