feat: guide user to call a contract

Cargo.toml

@@ -50,6 +50,8 @@ sp-core = "31"
 sp-weights = "30"
 contract-build = "5.0.0-alpha"
 contract-extrinsics = "5.0.0-alpha"
+contract-transcode = "5.0.0-alpha"
+scale-info = { version = "2.11.3", default-features = false, features = ["derive"] }
 heck = "0.5.0"
 
 # parachains