Fix `skywire cli visor route` subcommand implementation

[0pcom]

• removed parsing positional arguments - parsing flags only
• simplify initialization
• shorten subcommand names
• combine skywire cli visor route rule and skywire cli visor route ls-rules subcommands into skywire cli visor route

[0pcom]

The previous commit moves skywire cli visor route to skywire cli route and skywire cli visor tp to skywire cli tp

similar changes were made in combining subcommand functionality to the parent command and removing extra subcommands.