Standalone: Added support for interactive parser.

[erezsh]

parse_interactive and on_error are now working

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (44483c9) 89.35% compared to head (c611d56) 89.39%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1356      +/-   ##
==========================================
+ Coverage   89.35%   89.39%   +0.03%     
==========================================
  Files          52       52              
  Lines        7701     7729      +28     
==========================================
+ Hits         6881     6909      +28     
  Misses        820      820              

Flag	Coverage Δ
unittests	89.39% <100.00%> (+0.03%)	⬆️

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Files	Coverage Δ
lark/parsers/lalr_interactive_parser.py	78.94% <ø> (ø)
lark/tools/standalone.py	87.96% <100.00%> (+0.11%)	⬆️
tests/test_parser.py	95.07% <100.00%> (ø)
tests/test_tools.py	99.09% <100.00%> (+0.28%)	⬆️

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[MegaIng]

Looks good otherwise.