refactor!: Rename some accesskit and accesskit_consumer types

[PoignardAzur]

Closes #720

Rename accesskit::Tree to TreeInfo
Rename accesskit_consumer::Node to accesskit_consumer::NodeRef Rename accesskit_consumer::NodeId to FullNodeId
Rename accesskit_consumer::State to TreeState

Because the previous names were ambiguous or had collisions, a lot of files imported them with aliases.
This PR removes most of these alias imports.

This is a rename-only PR with no behavior changes; most changes were done with rust-analyzer's "rename symbol" assist and similar (non-AI) tools.

[DataTriny]

Please fix the intra doc links in the accesskit crate. We're clearly missing a CI check here.

accesskit::Tree is such a core type that I would prefer keeping it around for a few versions, but as a type alias:

#[deprecated]
pub type Tree = TreeInfo;

Any opinion on replacing the type name by Self on impl blocks?

I haven't reviewed everything yet.

[PoignardAzur]

Any opinion on replacing the type name by Self on impl blocks?

I think it could be a follow-up PR; mostly it would add even more noise.

[PoignardAzur]

I've made the requested changes.

I looked into splitting this PR into several smaller PRs, but I don't think it's practical (a lot of the renames affect overlapping lines).

[DataTriny]

@PoignardAzur Some of the CI jobs fail because you need to rebase and rename more stuff in the adapters.

[PoignardAzur]

I've fixed the Windows build failures, but I think the cargo-deny errors are unrelated to this PR?