[ticket/12039] Add config:* to the command line interface tool
* nickvergessen/ticket/12039:
[ticket/12039] Allow getting the value without a new line at the end
[ticket/12039] Do not print success message when config did not exist
[ticket/12039] Do not colour returned value in get command
[ticket/12039] Update command descriptions
[ticket/12039] Remove debug code
[ticket/12039] Fix option descriptions
[ticket/12039] Use an abstract class and some more minor adjustments
[ticket/12039] Add config:* to the command line interface tool