Feat: Add OpenAPI YAML support and configuration updates

[moutonjeremy]

Introduce OpenAPI YAML path configuration and support in the application, enhancing documentation capabilities. Update dependencies and include relevant documentation in README.

[Copilot]

Pull Request Overview

This PR introduces OpenAPI YAML specification support alongside the existing JSON format, enhancing the API documentation capabilities of the fiber-oapi library. The implementation adds comprehensive YAML support throughout the codebase while maintaining backward compatibility.

• Adds OpenAPI YAML endpoint configuration and generation functionality
• Updates dependency management to include yaml.v3 as a direct dependency
• Extends authentication middleware to exclude YAML endpoints from authentication requirements

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
types.go	Adds OpenAPIYamlPath field to Config struct for YAML endpoint configuration
go.mod	Promotes yaml.v3 from indirect to direct dependency
fiberoapi.go	Implements YAML spec generation and routing with proper content-type handling
docs_test.go	Extends test configuration to include YAML path testing
docs.go	Adds YamlPath field to DocConfig struct for documentation configuration
conditional_auth.go	Updates authentication middleware to exclude YAML endpoints
_examples/simple/main.go	Demonstrates YAML configuration in example application
_examples/simple/go.mod	Updates example dependencies for consistency
README.md	Documents the new YAML configuration option

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[Copilot]

Pull Request Overview

Copilot reviewed 9 out of 11 changed files in this pull request and generated no new comments.

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