Prefixed cookie support out of the box

[notramo]

https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies#cookie_prefixes

__Host- and __Secure- prefixed cookies mandate some security attributes to be present on the cookies, otherwise browsers entirely disregard them.

What about adding out-of-the-box support for these in Marten? If a prefixed cookie is set, the framework automatically set the required security attributes. I think that would make code more readable and in some cases save some accidental debugging time.