Set Font for filerobot

[Dubidubiduu]

Is your feature request related to a problem? Please describe.
Wanna use Photos to create social media sharepics. Sure, it's not that powerful, but everyone in my cloud you use it without register/login somewhere else.

But I definately need our house font. Therefore I would need to upload that font somewhere and add that to the tool config.

How?

Describe the solution you'd like

1. Upload that font to a specific folder without the need to reupload after app upgrade.
2. Add that font in nextcloud config file, via future photos admin backend or just custom CSS in admin backend.
3. Please also add documentation somewhere