Add Authorization header matching to IRequestBuilder

[Joshhua5]

Leveraged the existing header matching node and added configurable headers.

[Joshhua5]

I see there's complications when adding multiple headers, resulting in multiple matches.

So I've changed this PR to add another header type instead of an open dictionary.

[sandermvanvliet]

Thank you for creating this PR to extend the request matching 👍

I've left a few comments but nothing really major.

If you have the time would you be able to add an example of the usage to the README so that people are aware this is a possibility now?

[sandermvanvliet]

Could you change the name to AndAuthorization so that the usage is similar to AndContentType()?

So instead of

handler
    .RespondTo()
    .Post()
    .ForUrl("/api/infos/")
    .Authorization(new AuthenticationHeaderValue())
    .With(HttpStatus.OK);

have

handler
    .RespondTo()
    .Post()
    .ForUrl("/api/infos/")
    .AndAuthorization(new AuthenticationHeaderValue())
    .With(HttpStatus.OK);

[Joshhua5]

Changed applied :)

[sandermvanvliet]

Thanks for applying the changes 👍

[sandermvanvliet]

I'm going to merge this and then do a little work because the workflow doesn't run at the moment given that the test project references net6 still....

[sandermvanvliet]

Package has just been published as 2.11.0.0