update viewer2range to extract time range

[Mikejmnez]

This PR closes: #407 and #405 . In specific, it does:

• Time range extraction from poseidon viewer json data.
• Pythonic output format (time, lat, lon = viewer2range(p))
• updates name of function (from viewer_to_range to viewer2range)
• ValueError if the json argument contains more that one geometry type (e.g. Point and Polygon)
• upgrade testing.

Usage:

from poseidon_viewer import get_shapes
import json
shapes = json.loads(get_shapes())
timeRange, lats, lons = viewer2range(shapes)

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (c7d4039) 96.79% compared to head (ca20c01) 96.63%.

Files	Patch %	Lines
oceanspy/utils.py	90.90%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #408      +/-   ##
==========================================
- Coverage   96.79%   96.63%   -0.17%     
==========================================
  Files           9        9              
  Lines        4987     4987              
  Branches     1189     1190       +1     
==========================================
- Hits         4827     4819       -8     
- Misses         90       96       +6     
- Partials       70       72       +2     

Flag	Coverage Δ
unittests	96.63% <90.90%> (-0.17%)	⬇️

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[MaceKuailv]

Seems like a more robust function with better structured test