pty design + probe test

Cargo.lock

@@ -1976,6 +1976,16 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "pty-process"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71cec9e2670207c5ebb9e477763c74436af3b9091dd550b9fb3c1bec7f3ea266"
+dependencies = [
+ "rustix",
+ "tokio",
+]
+
 [[package]]
 name = "quinn"
 version = "0.11.9"
@@ -3690,6 +3700,7 @@ dependencies = [
  "futures",
  "lda-ipjs",
  "macaddr",
+ "pty-process",
  "serde",
  "serde_json",
  "serial_test",