Post-migration experience: Add domain DNS task (#39764)

* Add domain dns mapping task

* changelog

* Fix linter

* Try relative URL

* Remove calypso path callback

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/11348704666

Upstream-Ref: Automattic/jetpack@54a0bb7

vendor/automattic/jetpack-mu-wpcom/CHANGELOG.md

@@ -11,6 +11,7 @@ This is an alpha version! The changes listed here are not final.
 
 ### Added
 - Add new task for domain connection to post-migration checklist.
+- Add new task for domain mapping in migration Launchpad
 - Adds JSON translation files
 - Adds the placeholder task list for the Migration flow
 - Add the Plugin Review task for the Post-migration launchpad experience

vendor/automattic/jetpack-mu-wpcom/src/features/launchpad/launchpad-task-definitions.php

@@ -845,6 +845,13 @@ function wpcom_launchpad_get_task_definitions() {
 			'is_complete_callback' => 'wpcom_launchpad_is_domain_customize_completed',
 			'is_visible_callback'  => '__return_true',
 		),
+		'domain_dns_mapped'               => array(
+			'get_title'            => function () {
+				return __( "Update your domain's DNS", 'jetpack-mu-wpcom' );
+			},
+			'is_complete_callback' => 'wpcom_launchpad_is_task_option_completed',
+			'is_visible_callback'  => '__return_true',
+		),
 	);
 
 	$extended_task_definitions = apply_filters( 'wpcom_launchpad_extended_task_definitions', array() );

vendor/automattic/jetpack-mu-wpcom/src/features/launchpad/launchpad.php

@@ -324,6 +324,7 @@ function wpcom_launchpad_get_task_list_definitions() {
 				'review_site',
 				'review_plugins',
 				'connect_migration_domain',
+				'domain_dns_mapped',
 			),
 		),
 	);