fix: Make functions in encoding_utils.rs private

They shouldn't be used outside the crate by the users. They should reimplement this functions themselves.
Move encode_input to utils.rs

Took 8 minutes

src/encoding/evm/approvals/protocol_approvals_manager.rs

@@ -14,10 +14,7 @@ use tokio::{
 
 use crate::encoding::{
     errors::EncodingError,
-    evm::{
-        encoding_utils::encode_input,
-        utils::{get_client, get_runtime},
-    },
+    evm::utils::{encode_input, get_client, get_runtime},
 };
 
 /// A manager for checking if an approval is needed for interacting with a certain spender.