Multi-package setup: types/zod + legacy wrapper

[kvz]

This introduces:

• @transloadit/zod (/v3 and /v4, the latter generated from v3)
• @transloadit/node (the new home of the scopeless “transloadit” module, that will for the timebeing just be clone of this scoped node module so consumers don’t have to switch over
• @transloadit/types (generated from v3)

refs #263 (as indicated zod v3 schemas remain our single source of truth, while much of the ecosystem has not switched at, it is synced with many other repos, and it would be harder to write transformers from v4 to v3 because some features are just not supported. The best time is when the majority of the js ecosystem is no longer on v3)

this paves the way for

• other js runtimes having their own modules, while sharing core code from this repo
• projects like Uppy and Convex using types without dragging in zod, or the entire node-sdk
• housing more modules in this monorepo such as @transloadit/mcp-server

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[chatgpt-codex-connector]

Add a publish-time build hook for @transloadit/types

In packages/types/package.json, the scripts block defines generate/build but there is no prepack/prepare hook to ensure dist exists at publish time. Because dist/ is gitignored and the release workflow now runs changeset publish without a separate build step, publishing will produce a tarball that omits the generated .d.ts files, breaking consumers of @transloadit/types. Consider adding a prepack/prepare (or a release build step) that runs yarn generate && tsc --build before publishing.

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[chatgpt-codex-connector]

Add a publish-time build hook for @transloadit/zod

In packages/zod/package.json, the scripts block only defines sync/build tasks, but there is no prepack/prepare hook to ensure dist exists when publishing. Since dist/ is not tracked and the release workflow now calls changeset publish without a build step, @transloadit/zod would be published without its compiled dist/v3 and dist/v4 exports. Add a publish-time build hook or run yarn sync && tsc --build in the release workflow before publishing.

Useful? React with 👍 / 👎.