Add Turkish CVVC Phonemizer

[IsE333]

• Added TurkishCVVCPhonemizer in OpenUtau.Plugin.Builtin/TurkishCVVCPhonemizer.cs. This class includes logic for processing Turkish CVVC phonemes, handling consonant-vowel transitions, and generating phoneme results based on note attributes.

• Also added the Turkish language (languages.tr) in OpenUtau/Strings/Strings.axaml for the phonemizer language list.

[Copilot]

Pull Request Overview

This PR introduces a new Turkish CVVC phonemizer for processing Turkish phonemes along with adding Turkish language support.

• Implements TurkishCVVCPhonemizer with logic for handling consonant-vowel transitions.
• Adds a Turkish language string for UI localization in Strings.axaml.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
OpenUtau/Strings/Strings.axaml	Added Turkish language string entry
OpenUtau.Plugin.Builtin/TurkishCVVCPhonemizer.cs	Introduced TurkishCVVCPhonemizer with CVVC phoneme processing logic

Comments suppressed due to low confidence (2)

OpenUtau.Plugin.Builtin/TurkishCVVCPhonemizer.cs:8

• The language code in the phonemizer attribute is set to "TR" while the language key in the strings file is "tr". Consider aligning the casing to avoid potential case-sensitivity issues.

[Phonemizer("Turkish CVVC Phonemizer", "TR CVVC", "ise", language: "TR")]

OpenUtau.Plugin.Builtin/TurkishCVVCPhonemizer.cs:285

• The variable 'timeAxis' is used without an explicit declaration or context in this diff. Ensure that 'timeAxis' is properly defined or inherited to avoid compilation errors.

lastLengthFromOto = timeAxis.MsPosToTickPos(oto0.Preutter - oto0.Overlap);