MNT: fetch radar data from open-radar-data, add description/url

[kmuehlbauer]

• fetch radar data from open-radar-data
• add description/url to BackendEntrypoints
• test notebooks, fixup CI

[codecov]

Codecov Report

Merging #44 (a0c191b) into main (28ab806) will increase coverage by 0.00%.
The diff coverage is 81.25%.

@@           Coverage Diff           @@
##             main      #44   +/-   ##
=======================================
  Coverage   85.49%   85.49%           
=======================================
  Files          15       15           
  Lines        3005     3020   +15     
=======================================
+ Hits         2569     2582   +13     
- Misses        436      438    +2     

Flag	Coverage Δ
unittests	85.49% <81.25%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
xradar/accessors.py	39.13% <25.00%> (-0.87%)	⬇️
xradar/io/backends/cfradial1.py	82.22% <100.00%> (+0.40%)	⬆️
xradar/io/backends/furuno.py	90.27% <100.00%> (+0.05%)	⬆️
xradar/io/backends/gamic.py	86.61% <100.00%> (+0.10%)	⬆️
xradar/io/backends/iris.py	81.61% <100.00%> (+0.03%)	⬆️
xradar/io/backends/odim.py	87.98% <100.00%> (+0.05%)	⬆️
xradar/io/backends/rainbow.py	82.80% <100.00%> (+0.08%)	⬆️

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[kmuehlbauer]

@mgrover1 Just some maintenance on code and CI.

[mgrover1]

@kmuehlbauer I think we can go ahead and merge. For some reason code coverage is dropping, but still above 80% which is good!

[kmuehlbauer]

@kmuehlbauer I think we can go ahead and merge. For some reason code coverage is dropping, but still above 80% which is good!

There are more lines removed which counted to coverage before than added, so the overall coverage percentage decreased a bit.