Offline translation capability

[MrCsabaToth]

After introducing free translation via "traditional" Google Translator API, there's also a possibility to leverage on-device translation capability: by MLKit
https://pub.dev/packages/google_mlkit_translation

(This points towards a long term "wholesome" off-line capability. I was able to run Gemma 2b 16FP 4bit it with MLKit on device, however there's a long road ahead for these models to be as capable regarding function calling, structured output and other features of larger closed SOTA models liek Gemini. RecurrentGemma may help somewhat. On top of that we MMPA is multi modal, so we'd need at least PaliGemma, but we still haven't covered a re-ranking model. Gemma might be able to act as a reranker to some extent.)