[BUG] `vim` doesn't clean its scratch files on exit, and the quickstart complains about no matches found when it tries to source them

# Describe the bug

If you use `vim` to edit a file in `~/.zshrc.d` (or its variants), it leaves its scratch files behind. When you start a new session, `zqs` tries to source the scratch file and there's an ugly message about no matches found.

## Expected behavior

If `vim` won't clean those up, `zqs` should clean the directories before sourcing files in them.

