User confirmation when existing resources are going to be modified

[christophenne]

Is your feature request related to a problem? Please describe.
When testing in a cluster with existing components, it could happen that glasskube install overrides/changes existing components.

Describe the solution you'd like
The user should be warned and/or asked for confirmation whether to proceed.

To be discussed how exactly this should look like and work.

Describe alternatives you've considered

Additional context