Fix JSR slow types

[andreterron]

Our jsr packages are published using --allow-slow-types for now. We should remove it, but ideally with a build step or a new module root file for jsr. We have a number of types that are inferred from zod, and I'd rather not decrease the developer experience to fully support jsr.

To see which types raise this error, run npx jsr publish --dry-run on the individual packages.