feat: Implement predicate and projection pushdown for read_ndjson

[coastalwhite]

This PR adds predicate and projection pushdown in NDJson in a similar fashion as is done in CSV. This currently just filters after each chunk is deserialized, which is not perfectly efficient. It would probably be a good idea to do the projection during the into_series call and the predicate during the ...ChunkedBuilder append value.

[codecov]

Codecov Report

Attention: Patch coverage is 86.84211% with 10 lines in your changes missing coverage. Please review.

Project coverage is 80.86%. Comparing base (4d15fd4) to head (4368044).
Report is 4 commits behind head on main.

Files	Patch %	Lines
crates/polars-io/src/utils.rs	46.15%	7 Missing ⚠️
crates/polars-io/src/ndjson/core.rs	94.11%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17068      +/-   ##
==========================================
- Coverage   80.89%   80.86%   -0.03%     
==========================================
  Files        1455     1455              
  Lines      190961   191086     +125     
  Branches     2723     2723              
==========================================
+ Hits       154473   154518      +45     
- Misses      35984    36064      +80     
  Partials      504      504              

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[ritchie46]

Thanks. I think that's fine for now. It isn't a super common file format, so we can further optimize later.