don't fetch gitstatusd if there is no git

internal/p10k.zsh

@@ -6412,6 +6412,7 @@ _p9k_precmd_impl() {
             ret=$?
           fi
           if (( ret == 0 )); then
+            if (( $+commands[git] )); then
               (
                 local -i pid
                 {
@@ -6424,6 +6425,9 @@ _p9k_precmd_impl() {
                   fi
                 }
               )
+            else
+              ( builtin source "$__p9k_root_dir"/internal/wizard.zsh )
+            fi
             if (( $? )); then
               instant_prompt_disabled=1
             else