feat: added local flavor for Qatar

[omaarsaaleh]

Add Qatar localflavor support

This PR adds complete localflavor support for the Qatar

Form Fields:

• QANationalIDNumberField – Validates 11-digit Qatar ID numbers in the format CYYNNNSSSSS.
• QAMunicipalityField – Choice field for selecting from the 8 Qatar municipalities using ISO 3166-2:QA codes.

Model Fields:

• Corresponding model fields for all form fields with appropriate max_lengths and validation

Implementation Notes

• Municipality input accepts ISO codes, English names, and Arabic names, and stores ISO 3166-2:QA codes.
• Nationality checks in the National ID validator use ISO 3166-1 numeric country codes, which have been added to iso_3166.py.

Resources

Qatar National ID Format

• Microsoft Purview: Qatari ID Card Number Pattern
• Qatar Guides: QID Number Format

Qatar Municipalities

• Data.gov.qa: Municipalities in Qatar 2025

All Changes

• Add an entry to the docs/changelog.rst describing the change.

• Add an entry for your name in the docs/authors.rst file if it's not
  already there.

New Fields Only

• Prefix the country code to all fields.

• Field names should be easily understood by developers from the target
  localflavor country. This means that English translations are usually
  not the best name unless it's for something standard like postal code,
  tax / VAT ID etc.

• Prefer 'PostalCodeField' for postal codes as it's
  international English; ZipCode is a term specific to the United
  States postal system.

• Add meaningful tests. 100% test coverage is not required but all
  validation edge cases should be covered.

• Add .. versionadded:: <next-version> comment markers to new
  localflavors.

• Add documentation for all fields.

[omaarsaaleh]

Just pinging here, it should pass the tests now. Sorry for the disruption

[benkonrath]

No problem, thanks for the ping.

[benkonrath]

I'll have time to look over this early next week. Thanks for your patience.

[benkonrath]

Looks good.

[benkonrath]

Thank you for your contribution. 👍