Add docs for cakephp/cakephp#18958

en/appendices/5-3-migration-guide.rst

@@ -92,6 +92,8 @@ Console
 
 - Added ``TreeHelper`` which outputs an array as a tree such as an array of filesystem
   directories as array keys and files as lists under each directory.
+- Commands can now implement ``getGroup()`` to customize how commands are
+  grouped in ``bin/cake -h`` output.
 
 Core
 ----

en/console-commands/commands.rst

@@ -289,6 +289,24 @@ As well as in the help section of your command:
     Usage:
     cake user [-h] [-q] [-v]
 
+Grouping Commands
+=================
+
+By default in the help output CakePHP will group commands into core, app, and
+plugin groups. You can customize the grouping of commands by implementing
+``getGroup()``:
+
+    class CleanupCommand extends Command
+    {
+        public static function getGroup(): string
+        {
+            return 'maintenance';
+        }
+    }
+
+.. versionadded:: 5.3.0
+    Custom grouping support was added.
+
 .. _console-integration-testing:
 
 Testing Commands