chore: Rename encoder to strategy/swap_encoder

This was confusing me when I had all of them open at the same time. Better to be extra explicit

--- don't change below this line ---
ENG-4081 Took 2 minutes

src/encoding/evm/strategy_encoder/strategy_selector.rs

@@ -0,0 +1,32 @@
+use tycho_core::models::Chain;
+
+use crate::encoding::{
+    errors::EncodingError,
+    evm::strategy_encoder::strategy_encoders::{
+        SplitSwapStrategyEncoder, StraightToPoolStrategyEncoder,
+    },
+    models::Solution,
+    strategy_encoder::{StrategyEncoder, StrategySelector},
+};
+
+pub struct EVMStrategySelector;
+
+impl StrategySelector for EVMStrategySelector {
+    fn select_strategy(
+        &self,
+        solution: &Solution,
+        signer: Option<String>,
+        chain: Chain,
+    ) -> Result<Box<dyn StrategyEncoder>, EncodingError> {
+        if solution.straight_to_pool {
+            Ok(Box::new(StraightToPoolStrategyEncoder {}))
+        } else {
+            let signer_pk = signer.ok_or_else(|| {
+                EncodingError::FatalError(
+                    "Signer is required for SplitSwapStrategyEncoder".to_string(),
+                )
+            })?;
+            Ok(Box::new(SplitSwapStrategyEncoder::new(signer_pk, chain).unwrap()))
+        }
+    }
+}