docs: update docusaurus to v3 (#5625)

* update dependencies

* update onboarding mdx

* fixes for mdx issues

* fixes for mdx compatibility

* resolve mdx errors

* fixes in reference

* fix check errors

* revert change in vale action

* fix node version in action

* fix summary in markdown

www/packages/docs-ui/package.json

@@ -33,15 +33,15 @@
     "dev": "yarn build:js:cjs && yarn build:js:esm"
   },
   "devDependencies": {
-    "@types/react": "^17.0.1",
-    "@types/react-dom": "^17.0.1",
+    "@types/react": "^18.2.0",
+    "@types/react-dom": "^18.2.0",
     "@types/react-google-recaptcha": "^2.1.6",
     "clsx": "^2.0.0",
     "cpy-cli": "^5.0.0",
     "eslint-config-docs": "*",
     "next": "latest",
-    "react": "^17.0.1",
-    "react-dom": "^17.0.1",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
     "rimraf": "^5.0.1",
     "tailwind": "*",
     "tailwindcss": "^3.3.3",
@@ -50,11 +50,11 @@
     "typescript": "^5.1.6"
   },
   "peerDependencies": {
-    "@types/react": ">=17",
-    "@types/react-dom": ">=17",
+    "@types/react": "^18.2.0",
+    "@types/react-dom": "^18.2.0",
     "next": "*",
-    "react": ">=17",
-    "react-dom": ">=17"
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "dependencies": {
     "@medusajs/icons": "latest",