feat: integrate Raydium CPMM trading protocol support

- Add Raydium CPMM constants, instruction builder and pool implementation
- Implement unified buy/sell trading interface and event parsing system
- Update documentation and examples to support new protocol

src/streaming/event_parser/protocols/mod.rs

@@ -1,7 +1,9 @@
 pub mod pumpfun;
 pub mod pumpswap;
 pub mod bonk;
+pub mod raydium_cpmm;
 
 pub use pumpfun::PumpFunEventParser;
 pub use pumpswap::PumpSwapEventParser;
-pub use bonk::BonkEventParser;
+pub use bonk::BonkEventParser;
+pub use raydium_cpmm::RaydiumCpmmEventParser;