AddFonts - Download and Register Fonts from GDPR-Compliant Providers for Use in R Graphics

Download and register fonts from GDPR-compliant providers for use in R graphics. Supports weight-based providers (e.g. Bunny Fonts, <https://fonts.bunny.net/>) and file-based providers (e.g. Bye Bye Binary, <https://gitlab.com/bye-bye-binary>). Architecture allows for easy additions of font providers.