dsh-languages: Installing 14 Community Translations for DSH Web UI

The DSH interface only natively supports English and Chinese, while plugins can only register their own `ctx.locale` languages. The `dsh-languages` package registers 14 community languages (ru, es, pt-BR, de, fr, it, pl, tr, ja, ko, zh-TW, id, vi, hi) using `ctx.locale.addLanguage` and `register`. It covers chat, settings, plugins, scheduler, sidebar, and system messages without modifying `app.asar` and has zero dependencies. It supports three installation methods: UI, CLI, and offline. The README records tested compatibility with DSH 0.2.1-rc.5. The new version includes ready-made scripts for extracting English strings, rebuilding bundles, and checking key integrity. Dynamic metadata, compact units, and product names remain in English, allowing developers to create their own language plugins by referencing this package's structure.