Added more serialization options for csv writer.

[ritchie46]

This changes csv output for the Date64 datatype to also include the time information. So that a round trip of Date64 -> csv -> Date64 would not lose information.

[codecov]

Codecov Report

Merging #453 (7cf0c61) into main (db92910) will decrease coverage by 0.64%.
The diff coverage is 58.33%.

@@            Coverage Diff             @@
##             main     #453      +/-   ##
==========================================
- Coverage   80.64%   80.00%   -0.65%     
==========================================
  Files         372      371       -1     
  Lines       22691    22836     +145     
==========================================
- Hits        18300    18270      -30     
- Misses       4391     4566     +175     

Impacted Files	Coverage Δ
src/io/csv/write/serialize.rs	47.31% <50.00%> (+1.15%)	⬆️
tests/it/io/csv/write.rs	95.83% <100.00%> (+0.08%)	⬆️
src/alloc/mod.rs	0.00% <0.00%> (-93.03%)	⬇️
src/types/mod.rs	22.22% <0.00%> (-6.10%)	⬇️
src/array/dictionary/mutable.rs	76.66% <0.00%> (-5.48%)	⬇️
src/array/list/mutable.rs	70.96% <0.00%> (-4.90%)	⬇️
src/array/fixed_size_binary/mutable.rs	71.76% <0.00%> (-4.49%)	⬇️
src/array/fixed_size_list/mutable.rs	36.84% <0.00%> (-3.55%)	⬇️
src/array/boolean/mutable.rs	85.23% <0.00%> (-2.96%)	⬇️
src/array/utf8/mutable.rs	87.70% <0.00%> (-2.22%)	⬇️
... and 26 more

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[ritchie46]

To stay compliant with arrow-spec, I kept the default the same. I just give user more granular control in how to serialize different data types. Which makes sense as uses might want to serialize a time64 with more precision than a time32.