Migrate Type Hints for Python 3.10+ Compatibility

[pem70]

Is your feature or enhancement request related to a problem or limitation? Please describe

Python 3.9 will reach end-of-life in late 2025. Type hints should use modern syntax to align with Python 3.10+ standards

Describe your enhancement idea

Update type hints required only by Python 3.9 or below such as Union and Dict.

Describe alternatives you've considered

Provide any additional context

We still need to keep those type annotations now as we still support Python 3.9.

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[Savvythelegend]

Hey @pem70 @zFernand0 @t1m0thyj! 👋

I’d love to help out with this issue. Planning to start small — maybe update one file like file_system.py with modern type hints (using from __future__ import annotations and replacing things like Optional[str] with str | None, and Union[...] with X | Y style).
Will make sure to keep Python 3.9 compatibility intact.
Also happy to explore using other up-to-date patterns or typing modules if that adds value