Add in `Find: Include...` and `Find: Exclude...`

[twolfson]

These should have similar behavior to Quick File Creator meaning they open a quick_panel listing nearby directories. Once one is selected, add it to the current find_in_files search.

Edge case: What if I want to find in a file?

I am uncertain if we can add new paths to find_in_files/scrape it for data.

Worst case: Cache the last paths and add to that.