fix Transform.from_points for scalar spatial points

[bjlittle]

🚀 Pull Request

Description

This pull-request addresses the issue of geovista.bridge.Transfrom.from_points being unable to handle scalar spatial points e.g.,

>>> import geovista
>>> geovista.__version__
'0.5.3'
>>> from geovista.bridge import Transform
>>> Transform.from_points(0, 90).points
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<snip>/lib/python3.12/site-packages/geovista/bridge.py", line 685, in from_points
    xyz = to_cartesian(xs, ys, radius=radius, zlevel=zlevel, zscale=zscale)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<snip>/lib/python3.12/site-packages/geovista/common.py", line 731, in to_cartesian
    raise ValueError(emsg)
ValueError: Require longitudes and latitudes with same shape, got (1,) and () respectively.

Whereas, the following works as expected:

>>> Transform.from_points([0], [90]).points
pyvista_ndarray([[0., 0., 1.]])

---

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.32%. Comparing base (2414f7c) to head (cc59f72).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1184      +/-   ##
==========================================
+ Coverage   91.28%   91.32%   +0.03%     
==========================================
  Files          58       58              
  Lines        2939     2939              
==========================================
+ Hits         2683     2684       +1     
+ Misses        256      255       -1     

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