use `cmweather` colormaps in xradar

[kmuehlbauer]

Would be nice, if we advertise the usage of colorblind friendly colormaps.

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Codecov Report

Merging #128 (ebe9ee3) into main (62d6a4d) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #128   +/-   ##
=======================================
  Coverage   88.20%   88.20%           
=======================================
  Files          19       19           
  Lines        3333     3333           
=======================================
  Hits         2940     2940           
  Misses        393      393           

Flag	Coverage Δ
unittests	88.20% <ø> (ø)

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