Skip hidden fields in OpenAPI documentation

[moutonjeremy]

Implement functionality to exclude fields marked as hidden from OpenAPI documentation in both parameter extraction and schema generation. Add tests to ensure hidden fields do not appear in the generated OpenAPI schema and query parameters. Include hidden fields in the CreateUserInput and CreateUserOutput structures for runtime processing.

[Copilot]

Pull request overview

Adds support for hiding specific struct fields from generated OpenAPI docs via openapi:"-", applied consistently across schema generation and auto-parameter extraction, with tests and an example update.

Changes:

• Skip openapi:"-" fields when collecting referenced types and when generating component schemas.
• Skip openapi:"-" fields when extracting OpenAPI path/query/header parameters from input structs.
• Add tests and update the simple example to demonstrate hidden fields while keeping them available for runtime parsing/serialization.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
fiberoapi.go	Skips openapi:"-" fields during type collection and schema generation so hidden fields don’t appear in components/schemas.
common.go	Skips openapi:"-" fields during parameter extraction so hidden query/path/header fields don’t appear in operation parameters.
openapi_hidden_test.go	Adds coverage to ensure hidden fields are excluded from body schemas and query parameters in the emitted OpenAPI JSON.
_examples/simple/main.go	Demonstrates hidden fields in example request/response structs.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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