Clean up hyperspectral calibration protocol, move to documentation

[dlebauer]

We have a draft document + some notes that we reviewed in the September sensor standards committee meeting: https://docs.google.com/document/d/1w_zHHlrPVKsy1mnW9wrVzAU2edVqZH8i1IZa5BZxVpo/edit?usp=sharing

This document should be revised and moved to the TERRA REF documentation

TODO:

Completion criteria

• write up protocol (optionally following this template
• make sure that it shows up in the documentation by adding a link to the table of contents SUMMARY.md
• update the sensor calibration page, especially links