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/apps/docs/content/references/services/interfaces/AddPricesDTO.mdx

@@ -22,7 +22,7 @@ The prices to add to a price set.
   },
   {
     "name": "prices",
-    "type": "[`CreatePricesDTO`](CreatePricesDTO.mdx)[]",
+    "type": "[CreatePricesDTO](CreatePricesDTO.mdx)[]",
     "description": "The prices to add to the price set.",
     "optional": false,
     "defaultValue": "",