fix: Do not count intermediary tokens in indices

To achieve this, a small refactor was necessary with the introduction of a SwapGroup object, and a separate method to create a vec of these objects. This then separates all logic related to combining protocol data nicely and cleanly into its own method with its own tests.

TODO:
- Deal with split swaps and add test for split swap scenario
- Clean up all existing PR comments

src/encoding/models.rs

@@ -65,7 +65,7 @@ pub enum NativeAction {
 }
 
 /// Represents a swap operation to be performed on a pool.
-#[derive(Clone, Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
 pub struct Swap {
     /// Protocol component from tycho indexer
     pub component: ProtocolComponent,
@@ -111,6 +111,7 @@ pub struct Transaction {
 /// * `receiver`: Address of the receiver of the out token after the swaps are completed.
 /// * `exact_out`: true if the solution is a buy order, false if it is a sell order.
 /// * `router_address`: Address of the router contract to be used for the swaps.
+#[derive(Clone, Debug)]
 pub struct EncodingContext {
     pub receiver: Bytes,
     pub exact_out: bool,