MUTT build 1

feat: MUTT v1.0 - AI-powered translation toolkit

Desktop translation app with pluggable AI providers (OpenAI, Gemini,
OpenRouter, local models), offline engines (Argos, HuggingFace), and
support for PO, XLIFF, JSON, CSV, TXT, HTML, DOCX, XLSX, and PPTX
formats. Keyboard-first UI built for accessibility.