Give the Lao keyboard choice a Lao desktop layout

The row used la-latin1, kbd's Latin American Spanish keymap, so Lao
installs typed Spanish. There is no Lao console keymap; like Korean, the
console stays US and the desktop gets la, which Omarchy keeps behind US
as a non-Latin layout.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

install/provisioning/setup-form.sh

@@ -62,7 +62,7 @@ Japanese (US keyboard)|us|mozc
 Kazakh|kazakh
 Korean|us|hangul|kr
 Kyrgyz|kyrgyz
-Lao|la-latin1
+Lao|us||la
 Latvian|lv
 Lithuanian|lt
 Macedonian|mk-utf
@@ -114,7 +114,7 @@ omarchy_prompt_keyboard() {
 omarchy_persist_input_selection() {
   local target_root=${1:-} method=${keyboard_input_method:-none} layout=${keyboard_xkb_layout:-}
   case "$method" in none | mozc | hangul | pinyin | chewing) ;; *) return 1 ;; esac
-  case "$layout" in "" | kr) ;; *) return 1 ;; esac
+  case "$layout" in "" | kr | la) ;; *) return 1 ;; esac
   mkdir -p "$target_root/etc/omarchy"
   printf 'INPUT_METHOD=%s\nXKB_LAYOUT=%s\n' "$method" "$layout" > "$target_root/etc/omarchy/input-method"
 }