use grafana's ini config for initial setup

[jozic]

it should be possible to read grafana's ini file to make initial config file for wizzy as an alternative to manual setup with

$ wizzy set grafana url http://localhost:3000
$ wizzy set grafana username admin
$ wizzy set grafana password admin

something like $ wizzy set grafana settings <path.to.ini.file> would be nice or maybe just $ wizzy init <optional.path.to.ini.file>

thanks