Update react monorepo to v19

package.json

@@ -19,8 +19,8 @@
     "clsx": "1.2.1",
     "concurrently": "8.0.1",
     "next": "13.4.2",
-    "react": "18.2.0",
-    "react-dom": "18.2.0",
+    "react": "19.0.0",
+    "react-dom": "19.0.0",
     "react-markdown": "8.0.7",
     "remark-gfm": "3.0.1",
     "server-only": "0.0.1",
@@ -30,15 +30,15 @@
   },
   "devDependencies": {
     "@types/node": "18.16.9",
-    "@types/react": "18.2.6",
-    "@types/react-dom": "18.2.4",
+    "@types/react": "19.0.9",
+    "@types/react-dom": "19.0.3",
     "autoprefixer": "10.4.14",
-    "eslint": "9.32.0",
+    "eslint": "8.40.0",
     "eslint-config-next": "latest",
     "postcss": "8.4.23",
     "prettier": "2.8.8",
     "prettier-plugin-tailwindcss": "0.2.8",
-    "tailwindcss": "4.1.11",
+    "tailwindcss": "3.3.2",
     "typescript": "5.0.4"
   }
 }