add initial sphinx-gallery support

[bjlittle]

🚀 Pull Request

Description

This pull-request bootstraps sphinx-gallery documentation of the geovista.examples by including 3 examples:

• from_points__orca_cloud
• from_points__orca_cloud_eqc
• vectors

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[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (bbd83b7) 94.86% compared to head (b173e2c) 94.88%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/geovista/examples/vector_data/vectors.py	94.44%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #548      +/-   ##
==========================================
+ Coverage   94.86%   94.88%   +0.02%     
==========================================
  Files         117      119       +2     
  Lines        4728     4730       +2     
==========================================
+ Hits         4485     4488       +3     
+ Misses        243      242       -1     

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[tkoyama010]

Awesome!