[Issue 504] add "detail=min" parameter

[chmmao]

This is an attempt to address the Issue #504 by adding an additional parameter "detail=min" to the tables function.
When running the following code:

from pyvo import registry
registry.search(registry.Spatial((10, 10)), registry.Freetext("egal")) 

The runtime improves from 2s down to 1.2s (on my machine), while the output size is unchanged.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.31%. Comparing base (a9ac860) to head (86e52de).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #634   +/-   ##
=======================================
  Coverage   82.31%   82.31%           
=======================================
  Files          72       72           
  Lines        7429     7429           
=======================================
  Hits         6115     6115           
  Misses       1314     1314           

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