Deactivate an entire Model for x-faker

[siggi-k]

It must be possible to deactivate an entire Model for x-faker in schema.yaml.
But please do not delete the "ModelFaker" itself!

I have written a function ./yii faker/clear in this pullRequest, which uses the dependencies between the models.
#21

So that everything can be deleted, the reverse order must be observed. However, the sequence itself is determined by "ModelFaker".
This means that the "ModelFaker" should continue to exist, but must not generate any data.