chore: convert to cargo workspace with four crates

crates/xy-ipc/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "xy-ipc"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[dependencies]
+xy-protocol.workspace = true
+tokio.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+tracing.workspace = true
+thiserror.workspace = true
+
+[dev-dependencies]
+tempfile.workspace = true

crates/xy-ipc/src/lib.rs

@@ -0,0 +1 @@
+//! JSON-RPC 2.0 over newline-delimited JSON on a Unix socket.

crates/xy-protocol/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "xy-protocol"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[dependencies]
+serde.workspace = true
+serde_json.workspace = true
+thiserror.workspace = true
+kdl.workspace = true
+humantime.workspace = true
+humantime-serde.workspace = true
+
+[dev-dependencies]
+tempfile.workspace = true

crates/xy-protocol/src/lib.rs

@@ -0,0 +1 @@
+//! Wire types and config schema shared between the xy daemon and CLI.

crates/xy-supervisor/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "xy-supervisor"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[dependencies]
+xy-protocol.workspace = true
+tokio.workspace = true
+tracing.workspace = true
+thiserror.workspace = true
+nix.workspace = true
+async-trait.workspace = true
+
+[dev-dependencies]
+tokio-test.workspace = true
+tempfile.workspace = true

crates/xy-supervisor/src/lib.rs

@@ -0,0 +1 @@
+//! Process-supervision primitives for the xy daemon.

crates/xy/Cargo.toml

@@ -0,0 +1,27 @@
+[package]
+name = "xy"
+edition.workspace = true
+version.workspace = true
+license.workspace = true
+
+[[bin]]
+name = "xy"
+path = "src/main.rs"
+
+[dependencies]
+xy-protocol.workspace = true
+xy-supervisor.workspace = true
+xy-ipc.workspace = true
+tokio.workspace = true
+clap.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+tracing.workspace = true
+tracing-subscriber.workspace = true
+anyhow.workspace = true
+etcetera.workspace = true
+nix.workspace = true
+humantime.workspace = true
+
+[dev-dependencies]
+tempfile.workspace = true

crates/xy/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("xy: not implemented yet");
+}