Replace the usage of Any with generic types

Do not use Any type as suggested in the ANN401.

Instead of

from typing import Any

def get_first(container: list[Any]) -> Any:
    return container[0]

use the following

from typing import TypeVar

T = TypeVar('T')

def get_first(container: list[T]) -> T:
    return container[0]

Any can probably still make sense for the *args / **kwargs.

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