feat(i18n): add Turkish (tr) locale support
Add complete Turkish translation across all 7 i18n namespaces:
- common: actions, playback controls, locale metadata
- launch: HUD tooltips, audio/webcam controls, source selector
- editor: error messages, export, project, recording permissions
- dialogs: export progress, trim tutorial, unsaved changes, file dialogs
- settings: all panels (zoom, speed, trim, layout, effects, background,
crop, export, annotations, custom fonts, language, audio)
- shortcuts: keyboard shortcuts panel and all actions
- timeline: toolbar buttons, hints, labels, errors, success messages
Also adds "tr" to SUPPORTED_LOCALES config and i18n validation script.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Nadir A.
c36349d950