A better way to generate default status

[liubog2008]

Summary

Now we use kubebuilder:default to generate default value. However, it is not suitable for a complex type which needs a long comment.

It's not clear and hard to check and test.

Example

type Status struct {
    // +kubebuilder:default={{type:"A"},{type:"B"},{type:"C"},...}
    Conditions []Condition
}

Expected

• Auto generate default field in CRD by writing an initialize function.