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/FlagRouter.mdx

@@ -8,20 +8,20 @@ import ParameterTypes from "@site/src/components/ParameterTypes"
 
 ## Implements
 
-- [`IFlagRouter`](../interfaces/IFlagRouter.mdx)
+- [IFlagRouter](../interfaces/IFlagRouter.mdx)
 
 ## Constructors
 
 ### constructor
 
-**new FlagRouter**(`flags`)
+`**new FlagRouter**(flags)`
 
 #### Parameters
 
 <ParameterTypes parameters={[
   {
     "name": "flags",
-    "type": "Record<`string`, `boolean` \\| Record<`string`, `boolean`\\>\\>",
+    "type": "`Record<string, boolean \\| Record&#60;string, boolean&#62;>`",
     "description": "",
     "optional": false,
     "defaultValue": "",
@@ -48,7 +48,7 @@ import ParameterTypes from "@site/src/components/ParameterTypes"
 
 ### isFeatureEnabled
 
-**isFeatureEnabled**(`flag`): `boolean`
+`**isFeatureEnabled**(flag): boolean`
 
 Check if a feature flag is enabled.
 There are two ways of using this method:
@@ -63,7 +63,7 @@ An example of a nested flag is workflows. To use it, you would do:
 <ParameterTypes parameters={[
   {
     "name": "flag",
-    "type": "`string` \\| Record<`string`, `string`\\>",
+    "type": "`string` \\| `Record<string, string>`",
     "description": "The flag to check",
     "optional": false,
     "defaultValue": "",
@@ -92,16 +92,16 @@ ___
 
 ### listFlags
 
-**listFlags**(): [`FeatureFlagsResponse`](../types/FeatureFlagsResponse.mdx)
+`**listFlags**(): [FeatureFlagsResponse](../types/FeatureFlagsResponse.mdx)`
 
 #### Returns
 
-[`FeatureFlagsResponse`](../types/FeatureFlagsResponse.mdx)
+[FeatureFlagsResponse](../types/FeatureFlagsResponse.mdx)
 
 <ParameterTypes parameters={[
   {
     "name": "FeatureFlagsResponse",
-    "type": "{ `key`: `string` ; `value`: `boolean` \\| Record<`string`, `boolean`\\>  }[]",
+    "type": "`&#123; key: string ; value: boolean \\| Record&#60;string, boolean&#62;  &#125;`[]",
     "description": "",
     "optional": false,
     "defaultValue": "",
@@ -114,12 +114,12 @@ ___
 
 ### setFlag
 
-**setFlag**(`key`, `value`): `void`
+`**setFlag**(key, value): void`
 
 Sets a feature flag.
 Flags take two shapes:
-setFlag("myFeatureFlag", true)
-setFlag("myFeatureFlag", { nestedFlag: true })
+`setFlag("myFeatureFlag", true)`
+`setFlag("myFeatureFlag", { nestedFlag: true })`
 These shapes are used for top-level and nested flags respectively, as explained in isFeatureEnabled.
 
 #### Parameters
@@ -136,7 +136,7 @@ These shapes are used for top-level and nested flags respectively, as explained
   },
   {
     "name": "value",
-    "type": "`boolean` \\| { `[key: string]`: `boolean`;  }",
+    "type": "`boolean` \\| `&#123; [key: string]: boolean;  &#125;`",
     "description": "The value of the flag to set.",
     "optional": false,
     "defaultValue": "",