Custom CLI framework

[SteelAlloy]

• [x] implement global command options
• [x] help command
• [x] catch errors and output log to file
• [x] flags type checking
• [x] custom logger
• UX
  • [x] advise on similar commands, flags, etc.
• UI
  • [x] use ASCII for stdout as much as possible
  • [x] consistent look and feel

flag	description
-h, --help	Show this help
-V, --version	Display version number
-L, --log-level <level>	Set log level, info by default
-l, --log <path>	Specify filepath to output logs, nest-debug.log by default
-G, --gui	Perform the task in the gui