[Feature Request] Ability to load fonts from device memory or service such as google fonts

[zx8418]

Checklist

• This issue contains only one feature request. I will open one issue for every feature I want to request.
• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• This feature is merely an UI/UX update.
• This feature is not going to conflict with many of the existing features/options.

Is your feature request related to a problem? Please describe.

The fonts are often a matter of personal need or taste and no small list of fonts could satisfy every reader.

Describe the solution you'd like

I would like for the app to either/both:

• automatically (if found) load fonts from a folder in device memory and add them to the list of available fonts - other epub readers usually just import loose .ttf / .otf files from "fonts" folder on device storage;
• instead of list of predetermined/imported fonts just allow user to choose from fonts available from google fonts API using a searchbox or choose system sans or serif fonts.

How will you/everyone benefit from this feature?

Same as the answer to the first question.

Additional context

No response