[Feature] Search by subtitles

[dumdum7]

Is your feature request related to a problem? Please describe.
I want to find all the scenes where something is said.

Describe the solution you'd like
When I search for text, scenes with subtitle files containing that text should be displayed.

I'm not sure how the UI for this would look. Maybe a toggle somewhere to enable searching by subtitles. Maybe a separate page. Because otherwise a lot of unwanted results would be returned every time you'd want to search by scene title or some other scene property.