Add RAG

package.json

@@ -20,6 +20,7 @@
     "@tanstack/react-query": "^5.17.19",
     "antd": "^5.13.3",
     "axios": "^1.6.7",
+    "html-to-text": "^9.0.5",
     "langchain": "^0.1.9",
     "plasmo": "0.84.1",
     "property-information": "^6.4.1",
@@ -38,6 +39,7 @@
   "devDependencies": {
     "@plasmohq/prettier-plugin-sort-imports": "4.0.1",
     "@types/chrome": "0.0.259",
+    "@types/html-to-text": "^9.0.4",
     "@types/node": "20.11.9",
     "@types/react": "18.2.48",
     "@types/react-dom": "18.2.18",