feat: Add estimated_amount_in to Swap. Add SwapBuilder

Use SwapBuilder everywhere inside crate
Integration tests will be done later

--- don't change below this line ---
ENG-4696 Took 1 hour 56 minutes

Took 4 minutes

tests/uniswap_x_integration_tests.rs

@@ -52,6 +52,7 @@ fn test_sequential_swap_usx() {
         split: 0f64,
         user_data: None,
         protocol_state: None,
+        estimated_amount_in: None,
     };
     let swap_usdc_usdt = Swap {
         component: ProtocolComponent {
@@ -70,6 +71,7 @@ fn test_sequential_swap_usx() {
         split: 0f64,
         user_data: None,
         protocol_state: None,
+        estimated_amount_in: None,
     };
     let encoder = get_tycho_router_encoder(UserTransferType::TransferFrom);