Add language options for Deepgram

[my8bit]

Add Language Selection for Deepgram Speech Recognition

Summary

Adds configurable language selection for Deepgram Nova-3 speech-to-text with support for English, Dutch, and multilingual detection.

Changes Made

• Settings Configuration: Added new language setting to Deepgram settings group with dropdown options: multi (multilingual), en (English), nl (Dutch)
• WebSocket Integration: Updated Deepgram WebSocket URL construction to use dynamic language parameter instead of hardcoded en-US
• Language Mapping: Implemented proper API parameter mapping:
  • en → en-US (English)
  • nl → nl (Dutch)
  • multi → multi (Nova-3 multilingual support)
• Default Configuration: Set default to multi for automatic language detection

How to check:

• Language selection appears in Settings → Deepgram settings → Language
• Dropdown shows three options as requested
• Settings are saved to NVS and loaded on startup
• WebSocket URL correctly includes selected language parameter

Backwards Compatibility

• Existing installations will default to multi (multilingual)
• No breaking changes to existing API or functionality

[d4rkmen]

Language settings is good improvement, but lets not limit it by only 2 languages. Lets add all basic languages in the list, and allow to enter manually (not from the list) for the rest of them. Check example here, plz if (!item.min_val.empty() && !hal->keyboard()->keysState().fn)