Keep export of zod.gen and related code consistent with pre‑1.x versions

[xiankq]

would like to request that the export behavior for zod.gen and its associated code remain the same as it was in versions prior to 1.x,In the current version, the way these exports are handled has changed, which breaks compatibility with our existing codebase that relied on the old export style.

[benbrandt]

I don't really see this happening. This is generated code for a purpose and this is generated for use within the SDK.
I'm not sure what changed for you, but I guess I would advise you to adjust your import usage.