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/PricingContext.mdx

@@ -13,7 +13,7 @@ The context to calculate prices. For example, you can specify the currency code
 <ParameterTypes parameters={[
   {
     "name": "context",
-    "type": "Record<`string`, `string` \\| `number`\\>",
+    "type": "`Record<string, string \\| number>`",
     "description": "an object whose keys are the name of the context attribute. Its value can be a string or a number. For example, you can pass the `currency_code` property with its value being the currency code to calculate the price in. Another example is passing the `quantity` property to calculate the price for that specified quantity, which finds a price set whose `min_quantity` and `max_quantity` conditions match the specified quantity.",
     "optional": true,
     "defaultValue": "",