Add NCEI metrics

[MathewBiddle]

Number of packages archived since x date.

Split by hf radar, glider, ATN (once operational), etc

[MathewBiddle]

See:

• https://gist.github.com/MathewBiddle/c7ccab625b09897ccf7d37497d302c0b
• https://github.com/MathewBiddle/nceipy/blob/main/notebooks/ncei_metadata_collection.ipynb
• https://ioos.github.io/ioos_code_lab/content/code_gallery/data_access_notebooks/2017-06-12-NCEI_RA_archive_history.html