[Feature Request] Support to filter by Open Type Features

[nitramr]

Is your feature request related to a problem? Please describe.
Right now, I would like to filter fonts by their open type features. In an example, I want to know which fonts have a support for petite caps, historical ligatures or alternative variants of characters.

Describe the solution you'd like
Add a new filter in manage -> category for "Open Type Features". Group all fonts by their supported open type font feature.

Describe alternatives you've considered
n/a

Additional context
See https://en.wikipedia.org/wiki/List_of_typographic_features

[Jaoy1998]

#398 (comment)

[matj1]

This should include also filtering by variable axes. For example, I would filter fonts which have variable optical size or variable slant.