Added

• Add "--print-builtins" flag
• Add "info" word group
• Add "klog" log format
• Add "patterns", "words" and "patterns-and-words" color styles
• Add datetime patterns
• Add MAC address and UUID patterns

Changed

• Change cert-manager example log
• Use global variables in init* functions instead of returning the value
• Load built-in configs recursively

Fixed

• Check lowercased words
• Change colors for nginx-combined and nginx-ingress-controller logging formats
• Change checking process for log formats and word groups
• Rectify "print-builtins" after changes in d5fa7fd