Writer a separate operator to install KubeAGI with a CRD

[nkwangleiGIT]

we should define a CRD to make KubeAGI installation quite easy, so we can install u4a/cluster/kubeagi-system together without a deep understanding how they work.

[bjwswang]

@nkwangleiGIT should we also install cluster-component,u4a-component,kubebb-component in this operator?

[nkwangleiGIT]

yes, one command install using the CRD + controller, cover all components required.