Reading Config file and import predefined levels

[Ja4pp]

Is your feature request related to a problem? Please describe.
The feature that needs to be implemented is the reading of the config file with the following elements in there:

{
  mutator: { 
    includedMutations: ['@level1'] },
    excludedMutations: ['@AssignmentExpression'] 
  }
}

Moreover, the prefedined levels should be read and compared

Describe the solution you'd like

Describe alternatives you've considered
The previous implementation of mutationslevels with much more flexibility.

Additional context
A stakeholder requested a different approach to this project, which is more straightforward and allows for less flexibility.