feat: pqlib load library on windows

[costinmrr]

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[costinmrr]

Hooray, it works! :)

@EddyDeegan can you please have a look at the code?

@hongaar how should we proceed with this one? Is it better to open a new PR in the base repo and reference your old PR in the description?

[hongaar]

Awesome work @costinmrr, glad you were able to get it to work!! 💪
Will this pass their AppVeyor CI/CD?

Let's wait for @EddyDeegan to review and then yes please open a new PR and I'll close the old one, that makes the most sense to me.

[EddyDeegan]

Gone through it with Costin on Slack - looks great to me based on the fact it works on his system and the code changes look perfectly reasonable to me also!

[costinmrr]

Will this pass their AppVeyor CI/CD?

Of course :P