Can you dynamically change the query? e.g. `--ignore-file=vendored` in case of ripgrep

[wind0204]

Checklist

• I have fzf 0.54.0 or later
• I have searched through the existing issues

Output of :echo system(fzf#exec() .. ' --version')

0.66.1 (c1b259c0)

OS

• Linux
• macOS
• Windows
• Etc.

Problem / Steps to reproduce

Title

I just wanted to exclude a directory during my search.

It would make fzf.vim even more awesome!

Thank you so much as always!