Add Python SDK/TypeScript SDK examples to multilingual streaming

[gsharp-aai]

Summary

Adds SDK examples (Python SDK and JavaScript SDK) to multilingual streaming documentation and updates all code examples with enhanced logging to demonstrate real-time transcript progression and language detection.

Changes

• New SDK Examples: Added Python SDK and JavaScript SDK tabs with complete multilingual streaming implementations
• Enhanced Logging: All examples now log partial transcripts, utterances, and language detection results with clear labels
• Bug Fixes:
  • Updated Python example to use additional_headers (websockets v13.0+ compatibility)
  • Fixed JavaScript SDK to use correct snake_case field names (turn.end_of_turn, turn.language_code, etc.)
  • Updated extra_headers to additional_headers across multiple documentation files
• Improvements: Added installation instructions, dependency notes, and checks to avoid duplicate/empty logging

Notes

• Python SDK example includes utterance logging, but the SDK needs to be updated to properly expose the utterance field on TurnEvent objects

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