Add System constructors to TIA

[benjaminloerincz]

Add these constructors of namespace System to TIA:

• System.Continuation(Integer timeout)
• System.Cookie(String name, String value, String path, Integer maxAge, Boolean isSecure, String SameSite)
• System.Cookie(String name, String value, String path, Integer maxAge, Boolean isSecure)
• System.Cookie(String name, String value, String path, Integer maxAge, Boolean isSecure, String SameSite, Boolean isHttpOnly)
• System.HttpRequest()
• System.MultiStaticResourceCalloutMock()
• System.Network()
• System.RestRequest()
• System.RestResponse()
• System.SelectOption(String value, String label)
• System.SelectOption(String value, String label, Boolean isDisabled)
• System.StaticResourceCalloutMock()
• System.Url(String protocol, String host, Integer port, String file)
• System.Url(String protocol, String host, String file)
• System.Url(Url context, String spec)
• System.Url(String spec)
• System.Version(Integer major, Integer minor)
• System.Version(Integer major, Integer minor, Integer patch)
• System.XmlStreamReader(String xmlInput)
• System.XmlStreamWriter()