Extend migrator interface

Signed-off-by: Christopher Ng <chrng8@gmail.com>

lib/public/UserMigration/IMigrator.php

@@ -59,6 +59,27 @@ interface IMigrator {
 		OutputInterface $output
 	): void;
 
+	/**
+	 * Returns the unique ID
+	 *
+	 * @since 24.0.0
+	 */
+	public function getId(): string;
+
+	/**
+	 * Returns the display name
+	 *
+	 * @since 24.0.0
+	 */
+	public function getDisplayName(): string;
+
+	/**
+	 * Returns the description
+	 *
+	 * @since 24.0.0
+	 */
+	public function getDescription(): string;
+
 	/**
 	 * Returns the version of the export format for this migrator
 	 *