Channel implementation

This could be improved with crossbeam_queue in place of the mutex. Using
an existing channel would be nice but flume's Future unregisters the
waker on drop, making implementing it as an intermediate step in the Vm
diffiult as it requires storing the future somewhere.

Cargo.toml

@@ -1,12 +1,13 @@
 [workspace]
-members = ["amuse", "muse-lang", "muse-reactor", "muse-ui"]
+members = ["amuse", "muse-channel", "muse-lang", "muse-reactor", "muse-ui"]
 
 [workspace.dependencies]
 muse = { path = ".", default-features = false }
 muse-lang = { path = "muse-lang", default-features = false }
 kempt = { version = "0.2.3", features = ["serde"] }
 muse-ui = { path = "muse-ui" }
 muse-reactor = { version = "0.1.0", path = "muse-reactor" }
+muse-channel = { version = "0.1.0", path = "muse-channel" }
 cushy = { git = "https://github.com/khonsulabs/cushy" }
 alot = "0.3.1"
 crossbeam-utils = "0.8.19"
@@ -27,6 +28,7 @@ license = "MIT OR Apache-2.0"
 [features]
 default = ["repl"]
 reactor = ["dep:muse-reactor"]
+channel = ["dep:muse-channel"]
 ui = ["dep:muse-ui"]
 dispatched = ["muse-lang/dispatched"]
 repl = ["dep:rustyline", "dep:ariadne", "dep:dirs"]
@@ -40,6 +42,7 @@ required-features = ["repl"]
 [dependencies]
 muse-lang = { workspace = true }
 muse-reactor = { workspace = true, optional = true }
+muse-channel = { workspace = true, optional = true }
 muse-ui = { workspace = true, optional = true }
 ariadne = { version = "0.4.0", optional = true }
 dirs = { version = "5.0.1", optional = true }

muse-channel/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "muse-channel"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+muse-lang = { workspace = true }
+parking_lot = { workspace = true }