Support swagger oneOf

[StephanoGeorge]

https://swagger.io/docs/specification/data-models/oneof-anyof-allof-not/

For example:

type Response struct {
    Data any
}

func test(c *gin.Context) {
    switch c.Param("type") {
    case "string":
        c.JSON(http.StatusOK, Response{Data: String{...}})
        return
    case "int":
        c.JSON(http.StatusOK, Response{Data: Int{...}})
        return
    default:
    }
}

Thanks!

[StephanoGeorge]

Sorry for wrong repo