Add PlonkVerifierHelper library

[Hrom131]

• Since this PR suggests a bug fix, the tests have been added and the coverage is 100%.
• Since this PR introduces a new feature, the update has been discussed in an Issue or with the team.
• This PR is just a minor change, like a typo fix.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.94%. Comparing base (1908eec) to head (a9651bb).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #136   +/-   ##
=======================================
  Coverage   99.94%   99.94%           
=======================================
  Files          54       55    +1     
  Lines        3383     3412   +29     
  Branches      455      456    +1     
=======================================
+ Hits         3381     3410   +29     
  Misses          2        2           

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[Arvolear]

LGTM!