Add JSON output formatting to neighborhood finder

[yjzhang]

Add a new module neighborhood_finder.py, containing a parse_results_for_neighborhood_finder function.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #33   +/-   ##
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  Coverage        ?   16.11%           
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  Files           ?       16           
  Lines           ?     2290           
  Branches        ?        0           
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  Hits            ?      369           
  Misses          ?     1921           
  Partials        ?        0           

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