Datatype info in LGDO classes

[gipert]

I find the way LGDO.dtype, LGDO.datatype_name(), LGDO.form_datatype() are named/implemented a bit confusing and I would propose the following refactor (Array in the example):

class Array(LGDO):
  def __init__(self, nda, **kwargs):
    # ...
    self.npdtype: DTypeLike = self.nda.dtype

    @property
    def datatype(self) -> str:
      return f"array<{self.ndim}>{utils.get_element_type(self)}"

such that

>>> a = Array([1, 2, 3])
>>> a.npdtype
int
>>> a.datatype
array<1>{real}

Thoughts?