Can split passages into sentences. Improved embedding, LLM representation models, improved zero shot capabilities

Updated packages. Improve hierarchy vis. Better models - mixedbread and phi3. Now option to split texts into sentences before modelling.

Upgraded to Gradio 4.16.0. Guide for converting to exe added.

Fixed llm_config, environmental variable, zero shot topic model errors with quick embeddings

Changed readme colour to yellow

first commit