Remove proxy folder

[DimaStebaev]

• remove proxy folder
• fix github actions workflow
• fix eslint warnings
• add spell check

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (v2.3.0@228428d). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff            @@
##             v2.3.0    #1706   +/-   ##
=========================================
  Coverage          ?   92.29%           
=========================================
  Files             ?       26           
  Lines             ?     1466           
  Branches          ?      402           
=========================================
  Hits              ?     1353           
  Misses            ?       33           
  Partials          ?       80           

Flag	Coverage Δ
	92.29% <ø> (?)

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