fix: keep Sublime on the editor menu and persist subl

A when: subl guard hid the row before install, which is how the editor
gets packaged. Map stored sublime_text to subl so an existing default
stays ticked, and update the default-apps tests for the PATH name.

bin/omarchy-default-editor

@@ -17,6 +17,9 @@ if (($# == 0)); then
     read -r editor <"$editor_file"
   fi
 
+  # sublime-text-4 ships `subl`; older defaults stored `sublime_text`.
+  [[ $editor == sublime_text ]] && editor=subl
+
   [[ -n $editor ]] && echo "$editor" || echo "nvim"
   exit 0
 fi