feat(regex): add new isJson regex

[Echo-IV]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 71b691d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@scaleway/regex	Minor

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.95%. Comparing base (018f235) to head (71b691d).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2799      +/-   ##
==========================================
+ Coverage   68.92%   68.95%   +0.02%     
==========================================
  Files          44       44              
  Lines        1297     1298       +1     
  Branches      181      181              
==========================================
+ Hits          894      895       +1     
  Misses        380      380              
  Partials       23       23              

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