Create pgroll utils package that can also be used by the frontend-next app

[eemmiillyy]

Right now we have a bunch of duplicate pgroll logic for transforming the branch schema/running migrations/updating constraints/coercing column types inside /cli and frontend-next repo. We should probably create a shared package that contains these utils/helpers so we only have them in once place.

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[SferaDev]

We can probably reuse @xata.io/pgroll with a /utils module export