Move protocol to workspace root.

Cargo.lock

@@ -851,11 +851,11 @@ name = "unshell"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "crossbeam-channel",
  "rkyv",
  "static_init",
  "thiserror",
  "unshell-macros",
- "unshell-protocol",
 ]
 
 [[package]]
@@ -874,14 +874,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "unshell-protocol"
-version = "0.1.0"
-dependencies = [
- "crossbeam-channel",
- "rkyv",
-]
-
 [[package]]
 name = "ush-obfuscate"
 version = "0.1.0"