Added a shorthand for notifications (#209)

Added a shorthand for notifications

Reviewed-on: https://gitea.com/gitea/tea/pulls/209
Reviewed-by: 6543 <6543@noreply.gitea.io>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>

cmd/notifications.go

@@ -19,6 +19,7 @@ import (
 // CmdNotifications is the main command to operate with notifications
 var CmdNotifications = cli.Command{
 	Name:        "notifications",
+	Aliases:     []string{"notif"},
 	Usage:       "Show notifications",
 	Description: "Show notifications, by default based of the current repo and unread one",
 	Action:      runNotifications,