Feat/update kpt v1

• Re-organizes resources according to kpt kustomize package example.
  • gitlab-agent base can be initialized as a stand-alone base, making it easier for consumers to update when new versions are released.
  • overlays/cluster kustomizations can be committed to version control, following infrastructure as code practices
  • kpt live apply allows deployed resources to be better managed (when compared to kubectl apply...

Closes #205 (closed)