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).
⚠️ Report is 29 commits behind head on master.

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           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[Copilot]

Pull request overview

Adds Côte d'Ivoire (fr-CI) support to the isMobilePhone validator by introducing a new locale regex and corresponding test fixtures, extending the set of supported mobile phone locales.

Changes:

• Added fr-CI locale regex to src/lib/isMobilePhone.js.
• Added fr-CI valid/invalid fixture cases to test/validators.test.js.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/lib/isMobilePhone.js	Adds the fr-CI locale pattern to the phones locale-to-regex map.
test/validators.test.js	Adds fr-CI fixture coverage for accepted and rejected mobile formats.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

fr-CI is added to the phones map, but the README’s isMobilePhone locale list is now out of date (it currently enumerates supported locales and does not include fr-CI). Please add fr-CI to that documented locale list to keep public docs in sync with validator.isMobilePhoneLocales.