feat: implement kernel capability model

programs/src/shell/builtins.cpp

@@ -68,6 +68,7 @@ void cmd_help() {
     montauk::print("  fontscale [n]   Set terminal font scale (1-8)\n");
     montauk::print("  reset           Reboot the system\n");
     montauk::print("  shutdown        Shut down the system\n");
+    montauk::print("  suspend         Suspend the system\n");
     montauk::print("\n");
     montauk::print("Network commands:\n");
     montauk::print("  ping <ip>       Send ICMP echo requests\n");