feat(neswire): open the audio server

Captures a session's audio and hands it to the transport over a local socket.
Third component in, imported as a tree from `nestrilabs/neswire` on the same
terms as the previous two.

Wired to the workspace, `nesprotocol` by path. 4 tests pass.

`bin/hub-stub.rs` is a stand-in for the transport's listener, which is what lets
this be developed and tested without the rest of a box existing. It names the
transport by its old name, and is left for the rename commit along with the two
in the compositor.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

apps/neswire/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "neswire"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+pipewire = "0.10"
+crossbeam-channel = "0.5"
+anyhow = "1"
+opus-head-sys = "0.3"
+bytemuck = { version = "1", features = ["extern_crate_alloc"] }
+clap = { version = "4", features = ["derive", "env"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+nesprotocol = { path = "../../crates/nesprotocol" }