Feature: add AssemblyAI instrumentation in TS SDK

### Component

OpenLIT

### What feature would you like to see?

Add auto-instrumentation for AssemblyAI's JavaScript SDK (`assemblyai`) covering transcription and audio intelligence endpoints, matching the Python implementation.

- New TS instrumentation directory: `sdk/typescript/src/instrumentation/assemblyai/`
- Same span / event / metric shape as Python

### Why do you need this?

Python has `sdk/python/src/openlit/instrumentation/assemblyai/`. Node users running speech-to-text workloads currently have zero observability.

### Additional context

Add auto-instrumentation for the ElevenLabs JavaScript SDK (`elevenlabs` / `@elevenlabs/elevenlabs-js`) covering TTS and voice operations.

- New TS instrumentation directory: `sdk/typescript/src/instrumentation/elevenlabs/`
- Span / event / metric parity with Python

### Pre-submission checklist

- [x] I searched existing issues and didn't find a duplicate

### Are you willing to submit PR?

None