Feat: Mobile Phone validations Add Mexico

[anonYmousFPP]

Fixes: Mobile Phone validations - For The First Time Contributors #1761

Add Mobile Phone validation of Mexico

Screenshot:

Checklist

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

[rubiin]

Also add references and tests

[anonYmousFPP]

@rubiin I have added the references and tests.

[rubiin]

By reference , I mean a post that vouches for the regex.

[pano9000]

Generally speaking is "en-MX" correct here? Wouldn't be "es-MX" be more appropriate, or am I wrong here?

[anonYmousFPP]

The correct country code for Mexico is MX, and the locale code for Spanish spoken in Mexico is es-MX and code for English spoken in Mexico is en-MX.

[anonYmousFPP]

Added in Alphabetical order

and here is the Reference- https://en.wikipedia.org/wiki/Telephone_numbers_in_Mexico