Add kaigan dependency to Rust client

Cargo.lock

@@ -1944,6 +1944,15 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "kaigan"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6dd100976df9dd59d0c3fecf6f9ad3f161a087374d1b2a77ebb4ad8920f11bb"
+dependencies = [
+ "borsh 0.10.3",
+]
+
 [[package]]
 name = "keccak"
 version = "0.1.5"
@@ -3168,6 +3177,7 @@ version = "0.1.0"
 dependencies = [
  "assert_matches",
  "borsh 0.10.3",
+ "kaigan",
  "num-derive 0.3.3",
  "num-traits",
  "serde",

clients/rust/Cargo.toml

@@ -11,6 +11,7 @@ serde = ["dep:serde", "dep:serde_with"]
 
 [dependencies]
 borsh = "^0.10"
+kaigan = "^0.2"
 num-derive = "^0.3"
 num-traits = "^0.2"
 serde = { version = "^1.0", features = ["derive"], optional = true }