Improved chunking of TTS

[jpvajda]

Issue

• Specifically related to TTS implementing Chunking is a bit challenging for users.

Acceptance Criteria

• Chunking by having a native interface for different LLM responses
• Return TTS data as blobs through events when using chunking

[jpvajda]

@dvonthenen

[davidvonthenen]

This PR https://github.com/deepgram/deepgram-go-sdk/issues/240 obsoletes this one.