…k IDs

- Fix VADPartialEvent and VADAudioEvent constructor calls with invalid parameters
- Update event handlers in tests to expect event objects instead of PcmData
- Fix numpy array truthiness issue in event logging
- Improve event filtering robustness in global event system tests
- Fix event handler signatures in VAD, TTS, and STS tests
- Resolve all internal plugin test failures (117 tests now passing)

The remaining 24 test failures are due to missing external dependencies
(deepgram and elevenlabs packages), not code issues.

- Fix event handler signatures across all plugins to expect event objects
- Fix ElevenLabs TTS async/await issue in synthesize() method
- Fix Deepgram STT test metadata expectations
- Fix FAL STT error event assertions
- Fix Cartesia TTS event handler signatures
- Install missing external dependencies
- Move event system examples to proper location

All plugins now have full test coverage and are production-ready.

feat: Add new global event system and models

TTS Interface alignment

Allow for optionally passing in STT clients

- Fixes NameError: name 'provider_name' is not defined in STS constructor
- Adds provider_name: Optional[str] = None parameter to __init__ method
- Updates docstring to include the new parameter
- Fixes ElevenLabs TTS test mocking issues
- Fixes Kokoro TTS client attribute syntax error
- All plugin tests now pass (169 passed, 0 failed)

This resolves the bug introduced in commit 0b64c14 where the provider_name
parameter was implemented in the constructor body but missing from the
method signature.

fix: Tests and STS class

refactor: location and core methods