Extract expert assistant chat into a single library

[gstout52]

Parent issue: #6254

Description

Extract expert assistant chat into a single library (wishful thinking)

Tasks

• [ ] Given the MVP and fast moving pace of implementing the feature we are left with two code bases that are doing the same thing
• [ ] Currently we need to keep them in sync and duplicate functionality across repositories
• [ ] Problematic when schemas change, not doing this will double future development time every time, but doing this work early will reduce feature development in half
• [ ] The goal is to have the chat integration as a separate pluggable library that can integrate on both website and flowfuse application
• [ ] The goal is to create a self-contained vue micro-frontend, which can be deployed either via a script tag (in the case of the website) or plugged in the existing FF application frontend
• [ ] The sooner we do this the better, as building ontop will complicate extraction

Related Issues

• Parent: #6254