Add support of cookies to the Rest Client module

[ajkauffmann]

Describe the issue

Version v24 adds support for cookies to the HTTP calls. The Rest Client module currently doesn't support this.

Expected behavior

The Rest Client module should also support adding and reading cookies.

Steps to reproduce

The Rest Client module has no functions to add or read cookies.

Additional context

The Rest Client module supports working directly with the underlying HttpClient, and the HttpRequestMessage and HttpResponseMessage. In that way, cookies are supported. But it would be more developer-friendly if the module itself exposes functions to work with cookies.

I will provide a fix for a bug

• I will provide a fix for a bug

[JesperSchulz]

Of course approved!