feat: Add evm feature gate

- Move all evm code inside evm directory
- StrategyEncoder:
  - Kept StrategyEncoder trait but created a new one: EVMStrategyEncoder to implement encode_protocol_header (that is evm specific).
  - All StrategyEncoders implement both traits now
  - Renamed DefaultStrategySelector -> EVMStrategySelector
- RouterEncoder:
  - Created a RouterEncoder trait and a EVMRouterEncoder that implements it
- Moved utils inside evm directory as well
- Renamed config.json -> executor_addresses.json and moved it to a higher config directory
- Make alloy optional and dependent on the evm feature gate

--- don't change below this line ---
ENG-4075 <#DTT#>

src/encoding/models.rs

@@ -53,6 +53,7 @@ pub enum NativeAction {
 }
 
 #[derive(Clone)]
+#[allow(dead_code)]
 pub struct Swap {
     /// Protocol component from tycho indexer
     pub component: ProtocolComponent,
@@ -71,12 +72,14 @@ pub struct Transaction {
     pub value: BigUint,
 }
 
+#[allow(dead_code)]
 pub struct EncodingContext {
     pub receiver: Bytes,
     pub exact_out: bool,
     pub address_for_approvals: Bytes,
 }
 
+#[allow(dead_code)]
 pub enum ActionType {
     SingleExactIn = 1,
     SingleExactOut = 2,