Feature/turkish translation

[MarkesrBetter]

Description

This PR adds full Turkish (tr-TR) localization to the project.

• Translated all 557 strings from Translations.resx into a new Translations.tr-TR.resx file with high-quality terminology.
• Created README.tr-TR.md and CONTRIBUTING.tr-TR.md to fully localize the project's documentation.
• Registered the new language in SettingsViewModel.cs under the languages list.
• Updated the language selection bars in all existing README*.md and CONTRIBUTING*.md files to include the Turkish documentation link.

Type of change

• feat: — New optimization, customize setting, or app feature
• fix: — Bug fix
• refactor: — Code restructuring without behavior change
• docs: — Documentation
• test: — Adding or fixing tests
• i18n: — Translation / localization update
• chore: — Build, deps, CI, tooling

Screenshots (if UI changes)

Notes

Tested locally and all translations load correctly on the UI.

[itsfatduck]

@MarkesrBetter Thanks for contributing Turkish!

I noticed there are currently two Turkish translation PRs. I'm preparing some upcoming changes to optimizations, customization, and translations first, then I'll review both PRs together and follow up here.

[itsfatduck]

@MarkesrBetter Thank you for the complete Turkish language contribution!

Since PR #37 by @amhunter1 was opened first, I'll be merging its translations and README changes to keep the contribution order fair. However, your work is definitely not going to waste.

I really appreciate your contributions, especially the CONTRIBUTING-tr-TR document and the language switcher setup for the localized READMEs. Those additions are valuable and help improve the project's internationalization experience.

Thank you again for taking the time to contribute to optimizerDuck!