feat: add Turkish phone number (TR_PHONE_NUMBER) recognizer

[mrcuren]

Adds Turkish phone number recognizer to Presidio Analyzer, following up on the discussion in #1973.

The generic PhoneRecognizer uses python-phonenumbers and can parse Turkish numbers when TR is added to supported_regions. However, a country-specific recognizer provides additional value:

• TR-specific entity type (TR_PHONE_NUMBER vs generic PHONE_NUMBER) for targeted PII detection
• Comprehensive format validation: mobile (5XX), geographic (2XX/3XX/4XX) number ranges
• ITU-T E.164 compliance for Turkey (+90)
• MNP-aware validation (no operator-specific checks, as Mobile Number Portability makes them unreliable)
• Turkish + English context words for higher confidence detection

Features:

• Pattern recognition for mobile numbers (5XX) and geographic numbers (2XX/3XX/4XX)
• Supports international (+90), national (0), and local formats
• Country-specific validation via validate_result() and _validate_turkish_number()
• Context words in both Turkish and English
• Handles space, no-space, and hyphen separators
• Disabled by default as per country-specific recognizer guidelines

Legal basis: Karayolları Trafik Kanunu (KTK) Madde 23, ITU-T E.164.

Issue reference

Part of #1973

Testing

• Added test_tr_phone_number_recognizer.py with 51 test cases
• Tests include valid/invalid formats, geographic numbers, multiple numbers, false positive checks
• All existing tests continue to pass

Checklist

• I have reviewed the contribution guidelines
• My code follows the project style guidelines (ruff, pytest)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated the CHANGELOG.md under the Unreleased section
• I have updated the supported_entities.md documentation
• I have added my recognizer to default_recognizers.yaml with enabled: false
• I have added my recognizer to __init__.py and __all__

[mrcuren]

@SharonHart Following up on your feedback in #1973, this PR adds the country-specific Turkish phone number recognizer with:

• Mobile (5XX) + geographic (2XX/3XX/4XX) validation
• ITU-T E.164 compliance, MNP-aware
• Turkish + English context words
• 51 test cases, all passing

Ready for review when you have a chance.

[mrcuren]

Refactored per @SharonHart guidance. Fixed PhoneRecognizer._get_recognizer_result bug (entity_type=PHONE_NUMBER to self.supported_entities[0]). Deleted TrPhoneNumberRecognizer subclass - TR phone detection now uses PhoneRecognizer(supported_regions=['TR'], supported_entity='TR_PHONE_NUMBER', context=...) programmatically. 8 files changed, +61/-332. 40/40 TR phone tests, 26/26 existing phone tests, 57/57 Turkey recognizer tests all pass. Ruff lint: 0 errors.