Make sure zoxide is setup before using it for cd

.config/zsh/zoxide.zsh

@@ -1 +1,8 @@
-alias cd=z
+# alias cd=z
+cd() {
+  if whence -w z >/dev/null 2>&1; then # Does a command called 'z' exist right now?
+    z "$@"                             # use it
+  else
+    builtin cd "$@"                    # quiet fallback
+  fi
+}