Add join catalogs notebook

[camposandro]

Add a notebook to demonstrate joining Gaia DR3 with Gaia EDR3 distances. Closes #388.

[review-notebook-app]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.67%. Comparing base (b7f8127) to head (bf91cc8).
Report is 71 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #481   +/-   ##
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  Coverage   97.67%   97.67%           
=======================================
  Files          39       39           
  Lines        1546     1546           
=======================================
  Hits         1510     1510           
  Misses         36       36           

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[github-actions]

Before [b7f8127] <v0.4.1>	After [44a93b4]	Ratio	Benchmark (Parameter)
106±1ms	108±0.9ms	1.02	benchmarks.time_kdtree_crossmatch
31.9±0.4ms	32.4±0.4ms	1.02	benchmarks.time_polygon_search
14.5±0.04s	14.6±0.03s	1.01	benchmarks.time_create_large_catalog
17.7±0.4ms	17.6±0.3ms	0.99	benchmarks.time_box_filter_on_partition
2.16±0.02s	2.15±0.02s	0.99	benchmarks.time_create_midsize_catalog

Click here to view all benchmarks.