[RNE Rewrite] Add text to speech pipeline implementation

[IgorSwat]

Description

What this PR adds:

• Implementation of Text to Speech (Kokoro) pipeline for one-way streaming (single input, streamed output)

What this PR does not add:

• Two way streaming with LLM - needs to be implemented

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

Screenshots

Related issues

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

This is a draft / PoC type of PR, which needs some additional fixes from @is/core.

[barhanc]

Wrong target branch. You should target the rne-rewrite and in additional notes add something like "Needs #1293 before merging". After the core modifications get accepted and merged you can then rebase onto rne-rewrite and apply required modifications to this PR.