Size to fit ceiling and notch detection

• adds a random string generator
• dateTime string formatter fixes
• device classes for XR XS Max and hasNotch function
• UIView extension sizeToFitCeiling

Namespaced Categories

Add NFAllocInit prefix to all categories. This will prevent clashes with other libraries.

Colors and Dates

• adds HSL/CMYK functions to UIColor
• color interpolation based on HSB
• updated some enums for better Swift compatibility
• new NSDate category