Make SinkInfo, ServerInfo, and similar types available outside of callbacks about pulse-binding-rust

[jnqnfe]

Sorry for the delay, I'll try to take a look at it all soon. I'm not ignoring you :)

[agraven]

No worries, I've been quite busy myself as well :)

[j4w3ny]

Looking for the support of that as well :)

[acheronfail]

I've just started extensively using this crate, and the ergonomics of the API are difficult around these borrowed structs.
Since there's no public way to copy/clone them, we can only read them during the closures, and that makes it very difficult to consume...

For those curious, my workaround was to copy all of the structs, or create wrappers for some of them, and then inside the closures create instances of my struct copies. This isn't nice at all - if this crate changes anything then it'll break my structs, but it works for me for now.

I'm all for something like #43 - but instead of using a fork of this project with that addition (or just straight up duplicating the structs themselves), can we instead make some changes here? 🙏