Feature request: FuzzyOpen with query pre-populated

[schreifels]

Thank you for this great plugin! fzy accepts an option to pre-populate a query:

       -q, --query=QUERY
              Use QUERY as the initial search query.

It would be really useful if neovim-fuzzy exposed a function that would pass this value to fzy. My use case, for example, is that I want to write a simple plugin to open FuzzyOpen with a modified version of the current buffer's filename pre-populated (e.g. to quickly jump to a test file or some other similarly named file).

I started on an implementation of this, but I wasn't sure the right public interface to expose. Here's what I have so far: https://github.com/schreifels/neovim-fuzzy/commit/2e98b3351769d6d67b21b55c56075d07b4b9be53

Let me know your thoughts. Thanks!