Add Nigerians efik_NG person provider

[ifeoluwaoladeji]

Title: Add Efik (efik_NG) Locale to Faker

Description:

This pull request introduces support for the Efik language/locale (efik_NG) in the Faker library, enhancing Nigerian name coverage.

Changes made:

• Added faker/providers/person/efik_NG provider with:

  • Male and female first names
  • Last names
  • Prefixes

• Updated person/__init__.py to include efik_NG in the localized dictionary.

• Added unit tests in tests/providers/test_person.py to verify the new locale.

• Ensured all Faker tests pass with pytest.

References:

• Efik names: [Efik Naming System](https://efikeburutu.org/efik%20naming%20system.html)
• Compiled by: https://x.com/mb_awak
• Programming help: https://github.com/ifeoluwaoladeji

This extends Faker’s Nigerian locale support alongside previous contributions (e.g., ig_NG, yo_NG).

Test coverage:

• Added tests for first name, last name, and prefixes generation for male, female, and generic cases.
• All tests pass locally with Python 3.13 and pytest.

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This PR ensures that Faker users can generate realistic Efik names for testing, seeding, or demo data purposes.

• I have read the documentation about CONTRIBUTING
• I have read the documentation about Coding style
• I have run make lint

[ifeoluwaoladeji]

This extends Faker’s Nigerian locale support alongside previous contributions (e.g., ig_NG, yo_NG).

[fcurella]

My understanding is that the ISO letter code for Efik is efi. Can you rename the module to efi_NG?