Add minimum GHI limit check from Nollas et al. (2023)

[AdamRJensen]

• Closes Minimum GHI limit (QC check) #172
• Added tests to cover all new or modified code.
• Clearly documented all new API functions with PEP257 and numpydoc compliant docstrings.
• Added new API functions to docs/api.rst.
• Non-API functions clearly documented with docstrings or comments as necessary.
• Adds description and name entries in the appropriate "what's new" file
  in docs/whatsnew
  for all changes. Includes link to the GitHub Issue with :issue:`num`
  or this Pull Request with :pull:`num`. Includes contributor name
  and/or GitHub username (link with :ghuser:`user`).
• Pull request is nearly complete and ready for detailed review.
• Maintainer: Appropriate GitHub Labels and Milestone are assigned to the Pull Request and linked Issue.

Add the minimum GHI limit test from (10.1016/j.renene.2022.11.056) Quality control procedure for 1-minute pyranometric measurements of global and shadowband-based diffuse solar irradiance by F. Nollas, G. Salazar, & C. Gueymard.

See #172 for further details.

[AdamRJensen]

To make this PR pleasant to review, I'll make follow up PR adding checking of DHI which is somewhat more complex.