* First commit updating `config` to use subcommands (#2119)
- Implemented `get` subcommand
* Implmented `config set` as a subcommand.
* Implemented `config set_into` as subcommand
* Fixed base `config` command
- Instead of outputting help, it now outputs the list of all
configuration parameters.
* Added `config clear` subcommand
* Added `config load` and `config remove` subcommands
* Added `config path` subcommand
* fixed clippy
