Add merge_asof function to catalog

[smcguire-cmu]

Wraps the pandas merge_asof function as a catalog method, only available to use on the catalogs index columns (since other columns aren't sorted without shuffling) and without using the margin cache (since Margin Caches do not maintain sorted indices)

Closes #393

[codecov]

Codecov Report

Attention: Patch coverage is 92.59259% with 2 lines in your changes missing coverage. Please review.

Project coverage is 97.90%. Comparing base (57dca96) to head (55ede31).
Report is 3 commits behind head on main.

Files	Patch %	Lines
src/lsdb/catalog/catalog.py	81.81%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #409      +/-   ##
==========================================
- Coverage   98.00%   97.90%   -0.10%     
==========================================
  Files          44       44              
  Lines        1504     1531      +27     
==========================================
+ Hits         1474     1499      +25     
- Misses         30       32       +2     

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[github-actions]

Before [57dca96]	After [1738e42]	Ratio	Benchmark (Parameter)
failed	failed	n/a	benchmarks.time_box_filter_on_partition
1.55±0.03s	1.56±0.02s	1.01	benchmarks.time_create_midsize_catalog
10.2±0.1s	10.3±0s	1.00	benchmarks.time_create_large_catalog
92.6±1ms	91.3±1ms	0.99	benchmarks.time_kdtree_crossmatch
26.9±0.3ms	26.4±0.7ms	0.98	benchmarks.time_polygon_search

Click here to view all benchmarks.

[hombit]

I tested it and it works fine!

However, I've got this warning when running the code. This message is misleading, because margins wouldn't work anyway with the current merge_asof implementation:

.../lsdb/dask/join_catalog_data.py:446: RuntimeWarning: Right catalog does not have a margin cache. Results may be incomplete and/or inaccurate.
  warnings.warn(

[smcguire-cmu]

I tested it and it works fine!

However, I've got this warning when running the code. This message is misleading, because margins wouldn't work anyway with the current merge_asof implementation:

.../lsdb/dask/join_catalog_data.py:446: RuntimeWarning: Right catalog does not have a margin cache. Results may be incomplete and/or inaccurate.
  warnings.warn(

That's me misusing copy and paste, fixed now!

[hombit]

Thank you!