Updated wishlist graphql readme file

Author: CJ

app/code/Magento/WishlistGraphQl/README.md

@@ -1,4 +1,42 @@
-# WishlistGraphQl
+# Magento_WishlistGraphQl module
 
-**WishlistGraphQl** provides type information for the GraphQl module
-to generate wishlist fields.
+The **Magento_WishlistGraphQl** module adds, removes, and updates products on the wishlist.
+
+The **Magento_WishlistGraphQl** module extends **Magento_GraphQl** and **Magento_Wishlist** modules. The module provides type and resolver information for GraphQL API.
+
+## Installation details
+
+Before installing this module, note that the **Magento_WishlistGraphQl** is dependent on the following modules:
+
+- Magento_Catalog
+- Magento_Checkout
+- Magento_Customer
+- Magento_CustomerGraphQl
+- Magento_Directory
+- Magento_GiftMessage
+- Magento_GraphQl
+- Magento_Quote
+- Magento_Sales
+- Magento_Store
+
+For information about enabling or disabling a module in Magento 2, see [Enable or disable modules](https://devdocs.magento.com/guides/v2.4/install-gde/install/cli/install-cli-subcommands-enable.html).
+
+## Extensibility
+
+Extension developers can interact with the Magento_WishlistGraphQl module. For more information about the Magento extension mechanism, see [Magento plug-ins](https://devdocs.magento.com/guides/v2.4/extension-dev-guide/plugins.html).
+
+[The Magento dependency injection mechanism](http://devdocs.magento.com/guides/v2.4/extension-dev-guide/depend-inj.html) enables you to override the functionality of the Magento_WishlistGraphQl module.
+
+## Additional information
+
+For more information about the **Magento_WishlistGraphQl** [Queries](#queries) and [Mutations](#mutations) see below:
+
+### Queries {#queries}
+
+- [`wishlist`](https://devdocs.magento.com/guides/v2.4/graphql/queries/wishlist.html)
+
+### Mutations {#mutations}
+
+- [`addProductsToWishlist`](https://devdocs.magento.com/guides/v2.4/graphql/mutations/add-products-to-wishlist.html)
+- [`removeProductsFromWishlist`](https://devdocs.magento.com/guides/v2.4/graphql/mutations/remove-products-from-wishlist.html)
+- [`updateProductsInWishlist`](https://devdocs.magento.com/guides/v2.4/graphql/mutations/update-products-in-wishlist.html)