feat: add Supertonic 3 text-to-speech model

[IgorSwat]

Description

This PR adds a full pipeline and API for Supertonic 3 model. It also refactors the native TTS code to make it better organized across 2 different text-to-speech pipelines.

Introduces a breaking change?

• Yes
• No

Type of change

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Documentation update (improves or adds clarity to existing documentation)
• Other (chores, tests, code style improvements etc.)

Tested on

• iOS
• Android

Testing instructions

Run demo app in apps/speech.

Screenshots

Related issues

• Support useTextToSpeech with Supertonic, a lightning-fast, on-device multilingual text-to-speech #1194

Checklist

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings

Additional notes

Needs to be tested on iOS. Also, the typescript API is in a somewhat PoC state and will most likely need some changes.