Support COPY TO statement

[rfdavid]

This PR introduces the command COPY ([QUERY]) TO [file].
The command above will execute the passed query and store the results into the defined file. In this PR, it only supports .csv extension, so .parquet files will be supported in a separated one.

Example:

COPY (MATCH (p:person) RETURN id(p), p.ID, p.fName, p.gender, p.isStudent, p.height) TO "person.csv";

COPY (MATCH (a)<-[:knows|:studyAt]-(b:person) RETURN DISTINCT b.fName) to 'names.csv';

Related to #1692

[codecov]

Codecov Report

Patch coverage: 89.45% and project coverage change: -0.04% ⚠️

Comparison is base (0317cef) 89.53% compared to head (218a608) 89.49%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1716      +/-   ##
==========================================
- Coverage   89.53%   89.49%   -0.04%     
==========================================
  Files         827      834       +7     
  Lines       30310    30482     +172     
==========================================
+ Hits        27138    27281     +143     
- Misses       3172     3201      +29     

Files Changed	Coverage Δ
src/include/binder/binder.h	100.00% <ø> (ø)
src/include/common/copier_config/copier_config.h	100.00% <ø> (ø)
src/include/common/statement_type.h	100.00% <ø> (ø)
src/include/optimizer/factorization_rewriter.h	100.00% <ø> (ø)
src/include/parser/transformer.h	100.00% <ø> (ø)
...ical_plan/logical_operator/base_logical_operator.h	100.00% <ø> (ø)
src/include/processor/mapper/plan_mapper.h	100.00% <ø> (ø)
src/include/processor/operator/physical_operator.h	100.00% <ø> (ø)
src/planner/operator/base_logical_operator.cpp	73.23% <0.00%> (-1.05%)	⬇️
src/processor/operator/physical_operator.cpp	65.17% <0.00%> (-0.59%)	⬇️
... and 24 more

... and 4 files with indirect coverage changes

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[andyfengHKU]

Up to planning looks good to me. Good job.

[ray6080]

LGTM!