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/classes/AdminGetDiscountsDiscountRuleParams.mdx

@@ -12,14 +12,14 @@ Filters to apply on discounts' rules.
 
 ### constructor
 
-**new AdminGetDiscountsDiscountRuleParams**()
+`**new AdminGetDiscountsDiscountRuleParams**()`
 
 ## Properties
 
 <ParameterTypes parameters={[
   {
     "name": "allocation",
-    "type": "[`AllocationType`](../enums/AllocationType.mdx)",
+    "type": "[AllocationType](../enums/AllocationType.mdx)",
     "description": "Allocation to filter discount rules by.",
     "optional": true,
     "defaultValue": "",
@@ -28,7 +28,7 @@ Filters to apply on discounts' rules.
   },
   {
     "name": "type",
-    "type": "[`DiscountRuleType`](../enums/DiscountRuleType.mdx)",
+    "type": "[DiscountRuleType](../enums/DiscountRuleType.mdx)",
     "description": "Type to filter discount rules by.",
     "optional": true,
     "defaultValue": "",