feat: add crd management library #47
                
     Merged
            
            
          
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What this PR does / why we need it:
This PR adds a CRD management API that generalizes code that has been replicated in other repositories.
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
There is still some CRD coding under
pkg/init/crdswhich seems kind of outdated (?) resp. unused by other projects.We need to discuss what to do with that.
Release note: