Add Wiktionary th-pron transliterator to pythainlp.transliterate

[wannaphong]

What do these changes do

Adds a new wiktionary transliteration module (ported from Wiktionary Module:th-pron) into pythainlp.transliterate, with outputs for paiboon, royin, and ipa. It also exposes a small public API and adds core tests for expected behavior.

• New transliteration module

  • Added pythainlp/transliterate/wiktionary.py
  • Implements:
    • transliterate_wiktionary(text, mode="ipa")
    • get_word_dict(word) (returns word, paiboon, royin, ipa)
    • transliterate(...) alias for compatibility

• Package-level API exposure

  • Updated pythainlp/transliterate/__init__.py to export:
    • transliterate_wiktionary
    • get_word_dict

• Core test coverage

  • Added tests/core/test_transliterate_wiktionary.py
  • Registered it in tests/core/__init__.py

from pythainlp.transliterate import get_word_dict, transliterate_wiktionary

transliterate_wiktionary("แมว", mode="royin")  # "maeo"
get_word_dict("ปฺระ-ชา")
# {"word": "ปฺระ-ชา", "paiboon": "...", "royin": "...", "ipa": "..."}

What was wrong

pythainlp.transliterate did not provide the Wiktionary th-pron logic requested by the issue, so there was no built-in way to generate these three th-pron-style outputs from one implementation.

How this fixes it

Ports the th-pron transliteration logic into a dedicated module, wires it into package exports, and adds focused core tests to lock expected outputs and mode behavior (including unknown-mode passthrough and Thai digit handling).

Your checklist for this pull request

• Passed code styles and structures
• Passed code linting checks and unit test

[coveralls]

coverage: 66.979% (+0.2%) from 66.741% — copilot/add-module-th-pron into dev

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud