pass skim options to the fuzzy-pdf output

[Ornanovitch]

It would be awesome to be able to customize skim options, especially --bind and --preview-window.

I see it's hardcoded here:

https://github.com/MarioJim/fuzzy-pdf/blob/664323d84f4a9c0772a04aca6279897851468b0d/src/main.rs#L63-L69

It's a functional out-of-the-box setup but I cannot add nor override any setting with SKIM_DEFAULT_OPTIONS= env variable.