feat: add examples and enhance MEV protection services

This commit adds comprehensive examples for various trading operations including:
- PumpFun copy and sniper trading
- Bonk copy and sniper trading
- PumpSwap trading
- Raydium CPMM and AMM V4 trading
- Middleware system demonstration
- Event subscription

Enhanced MEV protection services with FlashBlock and Node1 integration.
Updated instruction modules for bonk, pumpswap, and raydium_cpmm.
Improved SWQOS modules for better transaction handling.

src/swqos/node1.rs

@@ -177,7 +177,10 @@ impl Node1Client {
         let start_time: Instant = Instant::now();
         match poll_transaction_confirmation(&self.rpc_client, signature).await {
             Ok(_) => (),
-            Err(_) => (),
+            Err(e) => {
+                println!(" node1{}确认失败: {:?}", trade_type, start_time.elapsed());
+                return Err(e);
+            },
         }
 
         println!(" node1{}确认: {:?}", trade_type, start_time.elapsed());