Add support for Kenya's new 01 mobile number format

[Francis-Yuppie]

Description:
This PR updates the Kenya phone number metadata to support the newly introduced 01 prefix for mobile numbers, while maintaining existing support for 07 and +254 formats.

Changes made:

1. Modified phonenumber_metadata_KE.php to:
   • Add 01\d to the mobile NationalNumberPattern
   • Update generalDesc pattern to include the new format
   • Maintain all existing validation rules and number lengths

Reason for changes:

• Kenya has introduced new mobile numbers starting with 01
• Current validation rejects these valid numbers
• The change ensures backward compatibility while adding new format support

Testing:
The updated pattern validates:

• Existing formats: 07XXXXXXXX, 7XXXXXXXX, +2547XXXXXXXX
• New formats: 01XXXXXXXX, +2541XXXXXXXX
• Maintains 9-digit length requirement

[Francis-Yuppie]

Description

Adds support for Kenya's newly introduced 01 mobile number prefix while maintaining backward compatibility with existing 07/+254 formats.

Changes Made

• Updated phonenumber_metadata_KE.php to:
  • Include 01\d in mobile NationalNumberPattern
  • Modified generalDesc pattern
  • Maintained all existing validation rules

Testing

Verified with:

• Valid: 0712345678, 0112345678, +254112345678
• Invalid: 0012345678 (double zero), 0212345678 (wrong prefix)

[Francis-Yuppie]

pr request

[Borales]

@Francis-Yuppie there's too many unrelated files in this PR