refactor: modern type hints in NDSL

[romanc]

Description

With #258 merged, it's somewhat safe to do type transformations. So lets update our types in NDSL to be a bit more modern. Generics like list & dict now expose the proper type and there's no need to import List & Dict from typings anymore. Along the same lines, Sequence, Iterator, and Generator are now deprecated aliases in the typing module because they natively exist in collections.abc. On top of that, since python 3.10, we can leverage | to replace Union and Optional. See typing docs.

How has this been tested?

Current tests, in particular mypy are still happy.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
  N/A
• I have made corresponding changes to the documentation (e.g. add new modules to docs/docstrings/)
  N/A
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules
  N/A
• New check tests, if applicable, are included
  N/A

[FlorianDeconinck]

Sweet - are we becoming an actual python repository ?! #Pinocchio

Close but unrelated, I think we can probably kill some of the TYPE_CHECKING left in there

[romanc]

Sweet - are we becoming an actual python repository ?! #Pinocchio

who knows, maybe we get there one day ...

Close but unrelated, I think we can probably kill some of the TYPE_CHECKING left in there

good point - I'll put it on my mental list for Friday afternoon cleanups. although, if you want to look like a python repo, there's absolutely nothing wrong with TYPE_CHECKING

[FlorianDeconinck]

good point - I'll put it on my mental list for Friday afternoon cleanups. although, if you want to look like a python repo, there's absolutely nothing wrong with TYPE_CHECKING

There isn't, but they always looked like a crouch to me. I'd rather have straightforward imports, rather than pre-processing tool dependent code in there. It is minor.