Add Frequency range

[mraspaud]

Adding the frequency range type for dataid

• Closes #xxxx
• Tests added
• Fully documented
• Add your name to AUTHORS.md if not there already

[codecov]

Codecov Report

Merging #1912 (d183d87) into main (85656a8) will decrease coverage by 0.06%.
The diff coverage is 55.38%.

@@            Coverage Diff             @@
##             main    #1912      +/-   ##
==========================================
- Coverage   93.41%   93.34%   -0.07%     
==========================================
  Files         275      275              
  Lines       40732    40795      +63     
==========================================
+ Hits        38048    38082      +34     
- Misses       2684     2713      +29     

Flag	Coverage Δ
behaviourtests	4.85% <26.15%> (+0.03%)	⬆️
unittests	93.91% <55.38%> (-0.07%)	⬇️

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Impacted Files	Coverage Δ
satpy/dataset/dataid.py	89.69% <44.23%> (-5.48%)	⬇️
satpy/readers/yaml_reader.py	96.55% <100.00%> (+<0.01%)	⬆️
satpy/tests/test_yaml_reader.py	99.55% <100.00%> (+<0.01%)	⬆️

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[coveralls]

Coverage decreased (-0.06%) to 93.843% when pulling d183d87 on mraspaud:feature-mhs into 85656a8 on pytroll:main.

[adybbroe]

This looks fine for me. I took it into the PR #1370 with the MHS-AAPP reader and tested, and so far it looks fine, it works as expected.