[FEAT] Embedded AnythingLLM (#656)

* WIP embedded app

* WIP got response from backend in embedded app

* WIP streaming prints to embedded app

* implemented streaming and tailwind min for styling into embedded app

* WIP embedded app history functional

* load params from script tag into embedded app

* rough in modularization of embed chat
cleanup dev process for easier dev support
move all chat to components
todo: build process
todo: backend support

* remove eslint config

* Implement models and cleanup embed chat endpoints
Improve build process for embed
prod minification and bundle size awareness
WIP

* forgot files

* rename to embed folder

* introduce chat modal styles

* add middleware validations on embed chat

* auto open param and default greeting

* reset chat history

* Admin embed config page

* Admin Embed Chats mgmt page

* update embed

* nonpriv

* more style support
reopen if chat was last opened

* update comments

* remove unused imports

* allow change of workspace for embedconfig

* update failure to lookup message

* update reset script

* update instructions

* Add more styling options
Add sponsor text at bottom
Support dynamic container height
Loading animations

* publish new embed script

* Add back syntax highlighting and keep bundle small via dynamic script build

* add hint

* update readme

* update copy model for snippet with link to styles

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Co-authored-by: timothycarambat <rambat1010@gmail.com>