feat(isMobilePhone): add phone number validation for Côte d'Ivoire (fr-CI)

[DipandaAser]

Description

This PR adds mobile phone number validation support for Côte d'Ivoire using the locale code fr-CI to the isMobilePhone validator.

References

Orange Telecoms CI: https://www.orange.ci/fr/plan-national-de-numerotation-a-10-chiffres.html
The article is in french but you can translate it in English

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (72573b3) to head (81853d3).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2577   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2535      2535           
  Branches       641       641           
=========================================
  Hits          2535      2535           

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