Open behavior multiple registration extensions

[Emopusta]

Hello,

I was adding multiple behaviors to my project and I didn't want to put my every behavior one by one like this:

services.AddMediatR(configuration =>
        {
            configuration.AddOpenBehavior(typeof(MyBehavior<,>));
            configuration.AddOpenBehavior(typeof(MyBehavior2<,>));
        });

so I decided to create my own AddBehaviors extension to add my behaviors by list at once. I thought this could help others without implementing their own extension.

Furthermore, I noticed there is a optional service lifetime implementation inside AddOpenBehavior so I added another extension with OpenBehavior entity. This helps developer to set every behavior service lifetime individually while registering their behaviors with multiple registration.

[Emopusta]

@zachpainter77 What is the relevancy between my pull request and your Timeout behavior support #1058 pull request. Can you explain why did you mention as a "direct response" to this pull request?

[zachpainter77]

@zachpainter77 What is the relevancy between my pull request and your Timeout behavior support #1058 pull request. Can you explain why did you mention as a "direct response" to this pull request?

Sorry I must have been mistaken.. I don't think these are actually related.. I'll remove that from my pr.

Edit: Actually it was a typo I meant to reference #1056