Add Turkish Tax Identification Number (TR_TAX_ID / VKN) recognizer #2449

Is your feature request related to a problem? Please describe.
Presidio currently supports TR_NATIONAL_ID (TCKN) and TR_LICENSE_PLATE under country_specific/turkey, but lacks a predefined recognizer for the Turkish Tax Identification Number (Vergi Kimlik Numarası / VKN) (TR_TAX_ID). In Turkish financial, legal, e-invoice, and KVKK compliance workflows, the 10-digit VKN issued by the Turkish Revenue Administration (Gelir İdaresi Başkanlığı - GİB) is a primary identifier that frequently appears in unstructured text and structured records.

Describe the solution you'd like
Add TrTaxIdRecognizer under presidio_analyzer/predefined_recognizers/country_specific/turkey/:

• Entity: TR_TAX_ID
• Language & Country Code: supported_language="tr", COUNTRY_CODE = "tr"
• Official Specification: Vergi Kimlik Numarası Genel Tebliği (Sıra No: 2), published in Official Gazette (Resmî Gazete) No: 23793.
• Format & Validation:
  • Pattern: 10 digits (\b[0-9]{10}\b) with a calibrated base score of 0.3.
  • validate_result: Verifies syntactic format and the official GİB Modulo-10 checksum algorithm. Candidates failing the checksum return False and are discarded; candidates passing the checksum return None to preserve the 0.3 base score (avoiding false-positive promotion of coincidental 10-digit numbers to 1.0) while allowing surrounding context words ("vergi kimlik", "vkn", "vergi no", "tax id", etc.) to boost confidence via ContextAwareEnhancer.
  • invalidate_result: Filters dummy repeated digit sequences (e.g., 4444444444, 0000000000).
• Configuration & Docs: Register in conf/default_recognizers.yaml (enabled: false, country_code: tr, supported_languages: ["tr"]) and document in docs/supported_entities.md.

Describe alternatives you've considered

• Using a custom PatternRecognizer with only a 10-digit regex (\b[0-9]{10}\b) without GİB Modulo-10 checksum filtering produces excessive false positives on phone numbers, order IDs, and timestamps.
• Promoting checksum matches directly to 1.0 (validate_result -> True) was also considered, but since a Modulo-10 check passes ~10% of random 10-digit numbers and cannot verify live assignment in GİB databases, returning None on valid checksum and relying on context enhancement provides a much safer precision/recall balance.

Additional context

• Official GİB VKN algorithm specification: For the first 9 digits $d_0 \dots d_8$ with weights $i = 9 - k$ ($k \in [0, 8]$), $c_1 = (d_k + i) \bmod 10$; if $c_1 \neq 0$, $c_2 = (c_1 \times 2^i) \bmod 9$ (with $c_2 = 9$ when $c_2 = 0$), else $c_2 = 0$. The 10th digit $d_9$ must equal $(10 - (\sum c_2 \bmod 10)) \bmod 10$.