refactor: optimize trading execution architecture and add wSOL management

- Simplify TradeExecutor interface by integrating middleware and swqos clients into params
- Refactor parallel execution module with dedicated buy/sell execute functions
- Add SOL wrapping/unwrapping functionality for wSOL management
- Remove redundant parameter passing in sell operations
- Delete example main.rs file
- Optimize transaction building with integrated parameter structures

BREAKING CHANGE: TradeExecutor interface simplified, middleware and swqos_clients now passed through params

examples/pumpswap_trading/src/main.rs

@@ -136,7 +136,6 @@ async fn create_solana_trade_client() -> AnyResult<SolanaTrade> {
         commitment: CommitmentConfig::confirmed(),
         priority_fee: priority_fee,
         swqos_configs,
-        lookup_table_key: None,
     };
 
     let solana_trade_client = SolanaTrade::new(Arc::new(payer), trade_config).await;
@@ -188,6 +187,7 @@ async fn pumpswap_trade_with_grpc(mint_pubkey: Pubkey, params: PumpSwapParams) -
             Box::new(params.clone()),
             None,
             true,
+            false,
         )
         .await?;
 
@@ -216,6 +216,7 @@ async fn pumpswap_trade_with_grpc(mint_pubkey: Pubkey, params: PumpSwapParams) -
             Box::new(params.clone()),
             None,
             true,
+            false,
         )
         .await?;