new_in_doc.md: Draft changelog

Author: adriendupuis

docs/resources/new_in_doc.md

@@ -7,6 +7,15 @@ month_change: true
 
 This page contains recent highlights and notable changes in [[= product_name =]] documentation.
 
+## April 2025
+
+- Added a [custom DAM connector example](add_image_asset_from_dam.md#extend-dam-support-by-adding-custom-connector)
+- Added v4.6.19 [release notes](ibexa_dxp_v4.6.md#ibexa-dxp-v4619) and [upgrade instructions](update_from_4.6.md#v4618),
+  introducing [Ibexa Rector](update_from_4.6.md#ibexa-rector), an optional tool helping to maintain your code
+- Added how to couple AI Actions and Ibexa Connect
+- Added [grace period definition and configuration](repository_configuration.md#grace-period-for-archived-versions)
+- Added [`/cart/{identifier}/summary` REST resource's `ShortCartSummary` response format](/api/rest_api/rest_api_reference/rest_api_reference.html#managing-commerce-carts-cart-summary)
+
 ## March 2025
 
 ### Release notes