Create plugin for DeepCoyp for nested ptr recursion, that can copy cycles

```go
type A struct {
	B *B
}

type B struct {
	A *A
}

func (a *A) Clone() *A {
	a1 := &A{B: &B{}}
	a1.B.A = a1

	tp := &A{}
	deriveDeepCopyA(tp, a1)
	return tp
}
```