feat(ios): iOS 13 supports system-wide font installation, apparently. So we should do that.

[mcdurdin]

TIL: we can install fonts in iOS 13 and later without the messy provisioning profiles we have used in the past.

• https://developer.apple.com/documentation/coretext/3227897-ctfontmanagerregisterfonturls?language=objc (wonderful documentation, Apple!)
• https://stackoverflow.com/questions/58510316/apple-developer-what-is-the-fonts-capability-under-register-an-app-id-for
• https://stackoverflow.com/questions/57653398/ios-13-custom-fonts-download-and-installation
• https://developer.apple.com/videos/play/wwdc2019/227/ has more detail apparently
• http://codeworkshop.net/objc-diff/sdkdiffs/ios/13.0/CoreText.html

Product context

• OS: iOS 13

[mcdurdin]

Note also:

Beginning in iOS & iPadOS 14, fonts installed using configuration profiles are only available to apps supporting the font APIs and entitlements introduced in iOS & iPadOS 13. If your app provides a custom font-selection interface, it can no longer access fonts installed via configuration profiles. For reference, see the WWDC 2019 Session Font Management and Text Scaling (55317428)

[chjatjat]

@mcdurdin, @jahorton I can grab this one!