Support for Zod 4 (now in beta)

> I'm posting this issue to all the libraries currently listed in the Ecosystem section of Zod's README. Apologies for the spam! Zod 4 is a big release and it's important to get as much of the ecosystem migrated as possible! 👍

## Zod 4 is now in beta

Hello! Colin here, creator of Zod. Thank you for contributing this package to the Zod ecosystem!

FYI, the first beta of Zod 4 has been released. It will be in beta for 4 weeks to allow time for ecosystem libraries (such as yours) to implement support before the first stable version is released. The first stable release will be in mid-May. Keep an eye on this PR to track progress: https://github.com/colinhacks/zod/pull/4074

Announcement post: https://v4.zod.dev/v4
Migration guide: https://v4.zod.dev/v4/changelog

⚠️ **Note** — To avoid confusion and outdated information, the Ecosystem page for Zod 4 is starting from scratch. You'll need to implement support for Zod 4 (guidance below). Once you've done that, submit a PR adding yourself to this file: https://github.com/colinhacks/zod/blob/v4/packages/docs/components/ecosystem.tsx

### Migration

There have been some significant changes.

- A new library `@zod/mini` has been released with a treeshakable/functional API that mirrors Zod's
- To facilitate code sharing between `zod` and `@zod/mini`, they both have a dependency on a new common core library `@zod/core`.
- This new package implements the schema subclasses that are then extended by `zod` and `@zod/mini` (and potentially future libraries). It makes it easy to support all these libraries simultaneously, with just one peerDependency on your end. There is little reason for any framework/library to depend directly on `zod` anymore.

```
pnpm install @zod/core@^0.0.1
```

This page is intended as a jumping-off point with some guidance for library authors: [`@zod/core` docs](https://v4.zod.dev/packages/core)

Don't hesitate to reach out for help/guidance!

- Post to the #zod4 channel on [the Discord](https://discord.gg/wXUBvtHu)
- Open an issue/discussion on [the repo](https://github.com/colinhacks/zod)
- DM me on Discord or [X](https://x.com/colinhacks)