bootctl: Add set-timeout verb

Fixes: #18766

shell-completion/bash/bootctl

@@ -57,7 +57,7 @@ _bootctl() {
 
     local -A VERBS=(
         # systemd-efi-options takes an argument, but it is free-form, so we cannot complete it
-        [STANDALONE]='help status install update remove is-installed random-seed systemd-efi-options list'
+        [STANDALONE]='help status install update remove is-installed random-seed systemd-efi-options list set-timeout set-timeout-oneshot'
         [BOOTENTRY]='set-default set-oneshot'
         [BOOLEAN]='reboot-to-firmware'
     )

shell-completion/zsh/_bootctl

@@ -46,6 +46,8 @@ _bootctl_reboot-to-firmware() {
         "list:List boot loader entries"
         "set-default:Set the default boot loader entry"
         "set-oneshot:Set the default boot loader entry only for the next boot"
+        "set-timeout:Set the menu timeout"
+        "set-timeout-oneshot:Set the menu timeout for the next boot only"
     )
     if (( CURRENT == 1 )); then
         _describe -t commands 'bootctl command' _bootctl_cmds || compadd "$@"