Enhancement/reduce verbosity

[MeyerBender]

Set the default logging level to WARNINGS instead of INFO to avoid printing walls of text when everything is working correctly.

Example usage:

import spatialdata_plot
from spatialdata.datasets import blobs

blob = blobs()

# this used to trigger printing of an info message
# now it just outputs the plot
blob.pl.render_shapes("blobs_circles", method='datashader').pl.show()

# to get the old, more verbose behavior
spatialdata_plot.set_verbosity(True)
blob.pl.render_shapes("blobs_circles", method='datashader').pl.show()

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.82%. Comparing base (2b10a49) to head (d3884fc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #524      +/-   ##
==========================================
+ Coverage   83.75%   83.82%   +0.06%     
==========================================
  Files           8        9       +1     
  Lines        2555     2566      +11     
==========================================
+ Hits         2140     2151      +11     
  Misses        415      415              

Files with missing lines	Coverage Δ
src/spatialdata_plot/__init__.py	100.00% <100.00%> (ø)
src/spatialdata_plot/_logging.py	92.68% <100.00%> (+1.01%)	⬆️
src/spatialdata_plot/_settings.py	100.00% <100.00%> (ø)

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