Fuzzy search enhancement

[sharpchen]

Current fuzzy search feature is quite limited to builtin commands like open_prev_doc, while sometimes one might like to work on other folders, it would be super handy if sioyek could implement the following features:

• recursive search option: documents might be classified in different nested folders; it sometimes would be better if we are able to search recursively (maybe should exclude folder entries if recurse is enabled)
• search anywhere: sometimes would like to search a fixed location where I store random documents, it would be better if a command was supported to search with specified path as arameter.
• ability to remap item cycling: one has vim habit would mostly prefer <C-n> and <C-p> or <C-j> and <C-k> to cycling through search items.

[ahrm]

You can remap item cycling in the development branch. See #1377 (comment).

[sharpchen]

Awesome! What do you think of other two, can we have them in 3.0?