Not needing manual type definitions for server

[galloj]

Description

The documentation claims that the server can be created with "Zero manual type definitions needed". However, in the example, zod is used to manually create types for runtime validation.

Proposal

The zod validator should be constructed automatically from the OpenAPI spec.

Possible alternative solutions: specify in the documentation how to construct the zod validator automatically from the OpenAPI spec; or remove the claim from the documentation.

Extra

• I’m willing to open a PR (see CONTRIBUTING.md)