Add Cell Phone, Default Time Zone and State Abbreviation translation for en-PAK locale

[wonderer007]

Motivation / Background

en-PAK locale missing cell phone format. The existing Faker::PhoneNumber.phone_number generator mixes both landline and mobile (even though that too is wrong per Pakistan format). This PR adds cell phone format for the en-PAK locale.

It also includes state abbreviations and default time zones.

Additional information

1. https://en.wikipedia.org/wiki/Abbreviations_of_administrative_units_of_Pakistan
2. https://en.wikipedia.org/wiki/List_of_telecommunication_companies_in_Pakistan

Checklist

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• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
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[wonderer007]

Here is the output that I have now in the console:

3.2.2 :021 > Faker::Config.locale = 'en-PAK'
 => "en-PAK" 
3.2.2 :022 > Faker::PhoneNumber.cell_phone
 => "0321-5631055" 
3.2.2 :023 > Faker::PhoneNumber.cell_phone
 => "0346-6844205" 
3.2.2 :024 > Faker::PhoneNumber.cell_phone
 => "0301-8081558" 
3.2.2 :025 > Faker::Address.default_time_zone
 => "Asia/Karachi" 
3.2.2 :026 > Faker::Address.state_abbr
 => "PK-JK" 
3.2.2 :027 > Faker::Address.state_abbr
 => "PK-SD" 
3.2.2 :028 > Faker::Address.state_abbr
 => "PK-TA" 

[stefannibrasil]

Is there a reason why there is a "PK" at the beginning here? I don't see that in this resource you shared.

[stefannibrasil]

There's only 7 administrative units here with different abbreviations: https://en.wikipedia.org/wiki/Administrative_units_of_Pakistan

Where is the eight one coming from? And why are they different from the wikipedia list?

[stefannibrasil]

You mentioned that this mixes both landline and mobile (even though that too is wrong per Pakistan format. Should this format be updated as well to differentiate them from the cell phones?