Support Nested Parquet Serialization

[smcguire-cmu]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.20%. Comparing base (c96fa7d) to head (b5205d7).
⚠️ Report is 237 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lsdb/nested/core.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #742      +/-   ##
==========================================
- Coverage   97.26%   97.20%   -0.07%     
==========================================
  Files          53       53              
  Lines        2267     2253      -14     
==========================================
- Hits         2205     2190      -15     
- Misses         62       63       +1     

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[dougbrn]

Nice, looks good! Just one point to address.