Add exclude dirs

[molleweide]

I found that trepo is including packer installed plugins and other repos
that I really don't want to end up in the search.

Which is easiest:

1. modify the locate command to exclude dirs.
2. modify trepo?

[cljoly]

This exists already actually, just by leveraging telescope’s filtering capabilities: https://cj.rs/telescope-repo-nvim/#exclude-irrelevant-results

However, it looks like it’s not easy to find in the README, if you have an idea of where to put it in the readme, feel free.

[molleweide]

Ah ofc, yeah I will look at this later and see if I can fix it. If so I'll add it to readme.