Macro vdev::cli_commands

macro_rules! cli_commands {
    ( :: $( $list:ident, )* :: mod $mod:ident, $( $rest:tt )* ) => { ... };
    ( :: $( $list:ident, )* :: $mod:ident, $( $rest:tt )* ) => { ... };
    ( :: $( $mod:ident, )* :: ) => { ... };
    ( $( $rest:tt )+ ) => { ... };
}

This macro simplifies the generation of CLI subcommand invocation structures by combining the creation of the command enum and implementation of the dispatch function into one simple list.