Update Checkout module content

Author: ravi-chandra3197

src/_data/codebase/v2_4/mrg/module-checkout.yml

@@ -2,6 +2,37 @@
 title: Checkout
 release: 2.4.3
 content: |-
-  Magento\Checkout module allows merchant to register sale transaction with the customer. Module implements consumer flow
-  that includes such actions like adding products to cart, providing shipping and billing information and confirming
-  the purchase.
+  Magento\Checkout module allows merchant to register sale transaction with the 
+  customer. 
+  Module implements consumer flow that includes such actions like adding products 
+  to cart, providing shipping and billing information and confirming the purchase.
+
+  #### Observer
+  This module observes the following events
+    `etc/events.xml`
+      `sales_quote_save_after` event in 
+      `Magento\Checkout\Observer\SalesQuoteSaveAfterObserver` file.
+    `/etc/frontend/events.xml`
+      `customer_login` event in `Magento\Checkout\Observer\LoadCustomerQuoteObserver`
+       file.
+      `customer_logout` event in `Magento\Checkout\Observer\UnsetAllObserver`
+  
+  ### Layouts
+  The module interacts with the following layout handles in the 
+    `view/frontend/layout`
+       `catalog_category_view`
+       `catalog_product_view`
+       `checkout_cart_configure`
+       `checkout_cart_configure_type_simple`
+       `checkout_cart_index`
+       `checkout_cart_item_renderers`
+       `checkout_cart_sidebar_item_price_renderers`
+       `checkout_cart_sidebar_item_renderers`
+       `checkout_cart_sidebar_total_renderers`
+       `checkout_index_index`
+       `checkout_item_price_renderers`
+       `checkout_onepage_failure`
+       `checkout_onepage_review_item_renderers`
+       `checkout_onepage_success`
+       `default`
+