Build script codegen initial impl

Cargo.toml

@@ -100,6 +100,11 @@ nix = { version = "0.26.4", default-features = false, features = ["term"] }
 
 [build-dependencies]
 anyhow = "1.0.75"
+indexmap = { version = "2.1.0", features = ["serde"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_with = "3.4.0"
+toml = { version = "0.8.6", features = ["preserve_order"] }
+walkdir = "2.4"
 
 [build-dependencies.clap]
 version = "4.4.10"