WIP - Additional features

[DamienDeepgram]

Proposed changes

Websocket Messages

• CloseStream
• Finalize

Websocket Lifecycle Events

• Open
• Close
• Error
• Result

Types of changes

• [x] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation update or tests (if none of the other choices apply)

Checklist

• [x] I have read the CONTRIBUTING.md doc
• [x] I have added tests and/or examples that prove my fix is effective or that my feature works
• [x] I have added necessary documentation (if appropriate)