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/trading_client/src/main.rs

@@ -56,6 +56,5 @@ fn create_trade_config(rpc_url: String, swqos_configs: Vec<SwqosConfig>) -> Trad
         commitment: CommitmentConfig::confirmed(),
         priority_fee: PriorityFee::default(),
         swqos_configs,
-        lookup_table_key: None,
     }
 }