#1756 generate 3-letter airport codes

[asolntsev]

A.k.a. IATA code (passenger-friendly 3-letter code).

This commit adds

1. enum AirportCodeType (IATA | ICAO)
2. method aviation.airport(IATA) -> 3-letter code
3. method aviation.airport(ICAO) -> 4-letter code

[what-the-diff]

PR Summary

• Introduction of a New Identifying System for Airports
  A new way to identify airports, called AirportCodeType, was added. This has two parts: IATA and ICAO, which are different types of identifiers used in aviation.

• Improvement in the Aviation Class
  The Aviation class was enhanced with a new function named airport(AirportCodeType codeType). It provides the airport codes based on the type you specify, making it simpler to retrieve the information you need.

• Deprecation and Replacement of the flight(String type) Method
  The previous method for getting flight information, called flight(String type), has been deprecated. Instead, a new method flight(AirportCodeType type) was introduced for more secure type management.

• Updates to YML File
  The YML file was updated to include lists of both IATA and ICAO airport codes. These can now be found under the tags airport_iata and airport_icao.

• Addition of Unit Tests
  New tests were added to assure the proper functioning of these changes. The AviationTest class now contains validations for both IATA and ICAO formats.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.37%. Comparing base (6543aa4) to head (5bd5a4a).
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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1763      +/-   ##
============================================
+ Coverage     92.32%   92.37%   +0.05%     
- Complexity     3439     3448       +9     
============================================
  Files           338      339       +1     
  Lines          6785     6794       +9     
  Branches        670      670              
============================================
+ Hits           6264     6276      +12     
+ Misses          355      353       -2     
+ Partials        166      165       -1     

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[Copilot]

Pull request overview

Adds explicit support for generating airport codes by type (IATA vs ICAO) in the Aviation provider, including new backing datasets and tests.

Changes:

• Introduces AirportCodeType enum (IATA, ICAO) and adds aviation.airport(AirportCodeType) overload.
• Adds flight(AirportCodeType) and deprecates flight(String) in favor of the enum-based API.
• Extends en/aviation.yml with airport_iata / airport_icao datasets and updates AviationTest accordingly.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/test/java/net/datafaker/providers/base/AviationTest.java	Adds tests for airport code generation by type and updates deprecated flight tests.
src/main/resources/en/aviation.yml	Adds new IATA/ICAO airport code lists used by the new API.
src/main/java/net/datafaker/providers/base/Aviation.java	Adds enum-based overloads for airport/flight and deprecates legacy flight(String).
src/main/java/net/datafaker/providers/base/AirportCodeType.java	New enum defining supported airport code types.

[kingthorin]

Thanks!!