[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

---------

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

embed/package.json

@@ -0,0 +1,43 @@
+{
+  "name": "anythingllm-embedded-chat",
+  "private": false,
+  "type": "module",
+  "scripts": {
+    "dev": "nodemon -e js,jsx,css --watch src --exec \"yarn run dev:preview\"",
+    "dev:preview": "yarn run dev:build && yarn serve . -p 3080 --no-clipboard",
+    "dev:build": "vite build && cat src/static/tailwind@3.4.1.js >> dist/anythingllm-chat-widget.js",
+    "build": "vite build && cat src/static/tailwind@3.4.1.js >> dist/anythingllm-chat-widget.js && npx terser --compress -o dist/anythingllm-chat-widget.min.js -- dist/anythingllm-chat-widget.js",
+    "build:publish": "yarn build && mkdir -p ../frontend/public/embed && cp -r dist/anythingllm-chat-widget.min.js ../frontend/public/embed/anythingllm-chat-widget.min.js",
+    "lint": "yarn prettier --write ./src"
+  },
+  "dependencies": {
+    "@microsoft/fetch-event-source": "^2.0.1",
+    "@phosphor-icons/react": "^2.0.13",
+    "dompurify": "^3.0.8",
+    "he": "^1.2.0",
+    "highlight.js": "^11.9.0",
+    "lodash.debounce": "^4.0.8",
+    "markdown-it": "^13.0.1",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "uuid": "^9.0.1"
+  },
+  "devDependencies": {
+    "@rollup/plugin-image": "^3.0.3",
+    "@types/react": "^18.2.37",
+    "@types/react-dom": "^18.2.15",
+    "@vitejs/plugin-react": "^4.2.0",
+    "autoprefixer": "^10.4.14",
+    "eslint": "^8.53.0",
+    "eslint-plugin-react": "^7.33.2",
+    "eslint-plugin-react-hooks": "^4.6.0",
+    "eslint-plugin-react-refresh": "^0.4.4",
+    "globals": "^13.21.0",
+    "nodemon": "^2.0.22",
+    "prettier": "^3.0.3",
+    "serve": "^14.2.1",
+    "terser": "^5.27.0",
+    "vite": "^5.0.0",
+    "vite-plugin-singlefile": "^0.13.5"
+  }
+}