docs: agregar descripcion a texto de ayuda de cada comando

src/git_flow/main.py

@@ -40,7 +40,7 @@ class GitFlowCommand(Command):
         subparsers = parser.add_subparsers(title="comandos", dest="command", required=True)
 
         for command in self.commands:
-            subparser = subparsers.add_parser(command.name())
+            subparser = subparsers.add_parser(command.name(), description=command.description())
             command.setup_parser(subparser)
 
         return parser