App API

echonext.New() creates an application that embeds *echo.Echo and initializes validation, route metadata, and an OpenAPI document.

Common setup methods include:

• SetInfo(title, version, description) for API metadata;
• GET, POST, PUT, PATCH, and DELETE for typed route registration;
• ServeOpenAPISpec and ServeSwaggerUI for generated documentation;
• AddSecurityScheme for reusable OpenAPI security definitions;
• Start for the standard server startup path.

Because Echo is embedded, methods such as Use, Group, Static, ServeHTTP, and standard handler registration remain available.