Advanced search functionality

[0Hughman0]

Would be great to enhance the search.

Whoosh seems to provide a ready-made way of parsing queries:

https://whoosh.readthedocs.io/en/latest/parsing.html

I think we should make this a different panel to the browser?

Can use the same tier tree widget?

Would need to be able to display a mixture of FolderTier and NotebookTier.

[0Hughman0]

Will need to think about how we build the index.

Perhaps optionally users specify which children we're looking at to save parsing over the whole tree?

[0Hughman0]

Whoosh looks like it's kinda inactive, but their is an active fork

https://github.com/Sygil-Dev/whoosh-reloaded