Add parsed statement visitor

[andyfengHKU]

Add parsed statement visitor. This infrastructure will be needed when we implement scan from pandas.

[codecov]

Codecov Report

Attention: 19 lines in your changes are missing coverage. Please review.

Comparison is base (109b826) 91.06% compared to head (24c3204) 91.04%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2396      +/-   ##
==========================================
- Coverage   91.06%   91.04%   -0.02%     
==========================================
  Files        1013     1015       +2     
  Lines       35928    36014      +86     
==========================================
+ Hits        32717    32790      +73     
- Misses       3211     3224      +13     

Files	Coverage Δ
src/binder/bound_statement_visitor.cpp	96.66% <100.00%> (+3.11%)	⬆️
src/include/binder/bound_statement_visitor.h	90.00% <ø> (ø)
...ude/parser/visitor/statement_read_write_analyzer.h	100.00% <100.00%> (ø)
src/main/connection.cpp	90.50% <100.00%> (-0.06%)	⬇️
...c/parser/visitor/statement_read_write_analyzer.cpp	100.00% <100.00%> (ø)
src/include/parser/parsed_statement_visitor.h	0.00% <0.00%> (ø)
src/parser/parsed_statement_visitor.cpp	80.43% <80.43%> (ø)

... and 4 files with indirect coverage changes

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