Related to #1599

We'll remove Vorpal as a dependency as it's no longer actively maintained. Following is a list of features we need to implement, to ensure feature parity with the capabilities that we're using.

• load all commands
• load only specific command if possible
• execute command
• long options
• short options
• validation
• automatically validate required options
• allow unknown options
• aliases
• option types
• show command help
• list all commands
• list all commands from the matching group
• prompt
• chalk
• help command
• version command
• exit codes support
• verify that there are no performance blockers
• align list of commands and command groups
• reformat docs to show options as a DL instead of a table
• bring coverage back to 100%
• remove vorpal
• update autocomplete
• define markshell theme