chore: added linter for JSON files

[PKulkoRaccoonGang]

Description

With the advent of design tokens, a large number of new JSON files have appeared in Paragon. This PR provides an extended configuration of the JSON file linter, including formatting, checking for duplicate keys, etc.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.91%. Comparing base (69e4fb1) to head (48ed59d).

Additional details and impacted files

@@              Coverage Diff              @@
##           release-23.x    #3330   +/-   ##
=============================================
  Coverage         93.91%   93.91%           
=============================================
  Files               232      232           
  Lines              3943     3943           
  Branches            933      901   -32     
=============================================
  Hits               3703     3703           
  Misses              236      236           
  Partials              4        4           

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[brian-smith-tcril]

Overall this LGTM! I am curious as to if we want to go the "lint everthing unless we ignore it" route or if we'd rather update the files: ['**/*.json'], in .eslintrc.js to be more specific.

I'm happy with this as-is though!

[PKulkoRaccoonGang]

I am curious as to if we want to go the "lint everthing unless we ignore it" route or if we'd rather update the files: ['**/*.json'], in .eslintrc.js to be more specific.

I think that the "lint everthing unless we ignore it" approach suits us. We have some files in JSON format that do not belong to the tokens folder and now they are also subject to the linter rules.

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