chore: Add in the documentation for the withWrapperData

lib/config/builder/config.ts

@@ -114,6 +114,20 @@ export class Config<Type extends Record<string, any>, WD> {
       },
     }
   }
+  /**
+   * Use this during the times that the input needs a more specific type.
+   * Used in types that the value/ variant/ list/ config is constructed somewhere else.
+  ```ts
+  const a = Config.text({
+    name: "a",
+    required: false,
+  })
+
+  return topConfig<WrapperData>()({
+    myValue: a.withWrapperData(),
+  })
+  ```
+   */
   withWrapperData<NewWrapperData extends WD>() {
     return this as any as Config<Type, NewWrapperData>
   }