List fonts available for iOS

InstalledFonts.cs

###
### FROM: https://blog.verslu.is/xamarin/xamarin-forms-xamarin/custom-fonts-with-xamarin-forms-revisited/
###
#if DEBUG
            var fontList = new StringBuilder();
            var familyNames = UIFont.FamilyNames;
            foreach (var familyName in familyNames)
            {
                fontList.Append(String.Format("Family: {0}\n", familyName));
                Console.WriteLine("Family: {0}\n", familyName);
                var fontNames = UIFont.FontNamesForFamilyName(familyName);
                foreach (var fontName in fontNames)
                {
                    Console.WriteLine("\tFont: {0}\n", fontName);
                    fontList.Append(String.Format("\tFont: {0}\n", fontName));
                }
            };
#endif