Feature: Notebook page on llama-ui

[leszekhanusz]

Prerequisites

• I am running the latest code. Mention the version if possible as well.
• I carefully followed the README.md.
• I searched using keywords relevant to my issue to make sure that I am creating a new issue that is not already open (or closed).
• I reviewed the Discussions, and have a new and useful enhancement to share.

Feature Description

Notebook page to the llama.cpp webui which allows raw text generation instead of using the chat API.

Motivation

It is useful for story generation and for debugging purposes.

Possible Implementation

See PR #19339 for a proposed implementation.