[V1] Fix importings for schedule repackaging

[wallashss]

Fix #45

I created a new file that we can import the needed classes from vllm and it solves depending the installed version (for backward compatibility).

I also did some changes that are only related to TYPE_CHECKING

[github-actions]

👋 Hi! Thank you for contributing to vLLM support on Spyre.
Just a reminder: Make sure that your code passes all the linting checks, otherwise your PR won't be able to be merged. To do so, first install the linting requirements, then run format.sh and commit the changes:

pip install -r requirements-lint.txt
bash format.sh

Now you are good to go 🚀

[joerunde]

LPGTM, thanks!

Personally I would slightly prefer following the if/else pattern on type checking so that we can use the real types in the hints, just because my VSCode happens to like that better

[wallashss]

HMMMM interesting!

Personally I would slightly prefer following the if/else pattern on type checking so that we can use the real types in the hints, just because my VSCode happens to like that better

I'll gonna do that now. Wait a sec.

[wallashss]

Done @joerunde

[joerunde]

nice!