Push CLI configuration option

Inspired by some other fellows idea at https://help.nextdns.io/t/35hl2jr/could-the-nextdns-dashboard-show-the-cli-version

Beside already mentioned idea at upper link, It would be really nice to have an option for inserting text configuration for CLI on the my.nextdns.io setup page, which would then be pushed to or pulled from CLI agent, which would allow easily configure CLI remotely.

Cheers