added type-hinting to communication scripts

[mihikadusad]

Made edits to comm_utils.py and interface.py to get rid of TypeError.

[tremblerz]

@CodiumAI-Agent /review

[CodiumAI-Agent]

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⚡ Recommended focus areas for review Type Hinting Consistency The type hint for the dest parameter in the send method has been updated to use Union instead of the shorthand syntax (|). Ensure this change aligns with the project's type hinting conventions and Python version compatibility. def send(self, dest: Union[str, int, List[Union[str, int]]], data: Any, tag: int = 0): Abstract Method Type Hint The send method in the CommunicationInterface class has updated its type hint for the dest parameter to use Union. Confirm that this change is consistent with the intended usage and does not introduce compatibility issues. def send(self, dest: Union[str, int], data: Any):