feat: add min args to subcommand

Author: Firebottle

types/modules/command-manager.d.ts

@@ -30,6 +30,7 @@ type RestrictionData = {
 export type SubCommand = BasicCommandDefinition & {
     arg: string;
     usage: string;
+    minArgs?: number;
     regex?: boolean;
     fallback?: boolean;
 };