Most of the refactor. Need to switch machines.

crates/io/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "io"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+
+description = "Raven's IO utilities"
+repository.workspace = true
+
+publish.workspace = true
+test.workspace = true
+
+[dependencies]
+derive_more.workspace = true
+subprocess.workspace = true