feat: Add clone to EVMTychoEncoder

--- don't change below this line ---
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src/encoding/strategy_encoder.rs

@@ -16,6 +16,7 @@ pub trait StrategyEncoder {
 
     #[allow(clippy::borrowed_box)]
     fn get_swap_encoder(&self, protocol_system: &str) -> Option<&Box<dyn SwapEncoder>>;
+    fn clone_box(&self) -> Box<dyn StrategyEncoder>;
 }
 
 /// Contains the supported strategies to encode a solution, and chooses the best strategy to encode