[ZSHCompletionGenerator] Remove code duplication
[Banner] Improve documentation and code order
[Banner] Refactor to reduce cyclomatic complexity
[Banner] Wrap to terminal width subcommands descriptions
[Banner] Use a plus sign for subcommands
[Banner] Align the descriptions of commands and of options
[Banner] Aling the descriptions of the subcommands and of the options
[Banner] Fix method lenght
[Banner] Extract string helpers to CLAide::Helper
[Banner] Remove magic number