fix: add more derive trait for ZkLoginEnv (#749)

fastcrypto-zkp/src/bn254/zk_login_api.rs

@@ -17,7 +17,7 @@ use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
 
 /// Enum to specify the environment to use for verifying keys.
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Serialize, Clone, Deserialize, Debug, Eq, PartialEq, Copy)]
 pub enum ZkLoginEnv {
     /// Use the secure global verifying key derived from ceremony.
     Prod,