feat: Implement Permit2

- Retrieve allowance data from an RPC
- Encode approvals:
  - Create PermitSingle (and PermitDetails)
  - Use alloy eip712 to get signing hash on typed data
  - Sign data
- Add chrono and alloy eip712 and signer-local to Cargo.toml

--- don't change below this line ---
ENG-4063 Took 1 hour 58 minutes

Took 18 seconds

Took 32 seconds

Took 9 seconds

Took 1 minute


Took 32 minutes

src/encoding/evm/router_encoder.rs

@@ -72,8 +72,7 @@ impl<S: StrategySelector, A: UserApprovalsManager> RouterEncoder<S, A> for EVMRo
                 owner: solution.sender.clone(),
             });
         }
-        Ok(self
-            .approvals_manager
-            .encode_approvals(approvals))
+        self.approvals_manager
+            .encode_approvals(approvals)
     }
 }