Enhance CLI and command structure with subcommands and help options #12
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Add subcommands to CLI commands for better organisation.
It will help when we are developing library features that require multiple commands.
Enhance help options to provide detailed usage information for each subcommand.
jac --help|jac-> shows general helpjac build --help-> shows help for build commandsjac wifi --help|jac wifi-> shows help for wifi commands = keyword for subcommandsjac wifi add --help-> shows help for adding wifi networks = subcommand under wifi