fix(cli): keep completion flag when loading multiple plugins (#14032)

lib/cli.zsh

@@ -519,7 +519,7 @@ function _omz::plugin::load {
     # Check if it has completion to reload compinit
     local -a comp_files
     comp_files=($base/_*(N))
-    has_completion=$(( $#comp_files > 0 ))
+    (( has_completion )) || has_completion=$(( $#comp_files > 0 ))
 
     # Load the plugin
     if [[ -f "$base/$plugin.plugin.zsh" ]]; then