feat(launcher): add arg validation and drop subprocess (#595)

Author: OlivierDehaene

Cargo.lock

@@ -9,9 +9,9 @@ homepage.workspace = true
 [dependencies]
 clap = { version = "4.1.4", features = ["derive", "env"] }
 ctrlc = { version = "3.2.5", features = ["termination"] }
+nix = "0.26.2"
 serde = { version = "1.0.152", features = ["derive"]  }
 serde_json = "1.0.93"
-subprocess = "0.2.9"
 tracing = "0.1.37"
 tracing-subscriber = { version = "0.3.16", features = ["json"] }