Support generating EventSource clients for text/event-stream endpoints

OpenAPI explicitly supports text/event-stream as a response media type (See https://spec.openapis.org/oas/latest.html#media-types). Currently swagger-typescript-api generates these endpoints as a standard request(), where T is the schema of a single event payload. However, this is semantically incorrect because an SSE endpoint produces a sequence of events rather than a single response object.

Would you be interested in adding optional support for generating SSE-aware clients (for example returning EventSource, AsyncIterable, or via a configurable template) when the response media type is `text/event-stream`?