feat: refactor to multi-protocol event streaming system

Major architectural refactor, upgrading from simple logging system to comprehensive multi-protocol Solana DEX event streaming system:

✨ New Features:
- Support for 5 DEX protocols: PumpFun, PumpSwap, Bonk, Raydium CPMM, Raydium CLMM
- Implement unified event interface (UnifiedEvent trait) and event factory pattern
- Add dual streaming support: Yellowstone gRPC and ShredStream
- Add Chinese documentation (README_CN.md)

🏗️ Architectural Improvements:
- Refactor event parsing system with modular design
- Implement protocol-specific parsers and event types
- Optimize dependency management, update Cargo.toml
- Remove legacy logging modules, clean up redundant code

📊 Statistics:
- Added 46 files, 4511 lines of code
- Removed 1381 lines of legacy code
- Net addition of 3130 lines of code

Tech Stack:
- Rust async/await for asynchronous processing
- Protocol Buffers support
- Multi-protocol event parsing
- High-performance event stream subscription

src/streaming/event_parser/protocols/pumpfun/events.rs

@@ -0,0 +1,113 @@
+use borsh::BorshDeserialize;
+use serde::{Deserialize, Serialize};
+use solana_sdk::pubkey::Pubkey;
+
+use crate::streaming::event_parser::common::EventMetadata;
+use crate::impl_unified_event;
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
+pub struct PumpFunCreateTokenEvent {
+    #[borsh(skip)]
+    pub metadata: EventMetadata,
+    pub name: String,
+    pub symbol: String,
+    pub uri: String,
+    pub mint: Pubkey,
+    pub bonding_curve: Pubkey,
+    pub user: Pubkey,
+    pub creator: Pubkey,
+    pub timestamp: i64,
+    pub virtual_token_reserves: u64,
+    pub virtual_sol_reserves: u64,
+    pub real_token_reserves: u64,
+    pub token_total_supply: u64,
+    #[borsh(skip)]
+    pub mint_authority: Pubkey,
+    #[borsh(skip)]
+    pub associated_bonding_curve: Pubkey,
+}
+
+impl_unified_event!(
+    PumpFunCreateTokenEvent,
+    mint,
+    bonding_curve,
+    user,
+    creator,
+    timestamp,
+    virtual_token_reserves,
+    virtual_sol_reserves,
+    real_token_reserves,
+    token_total_supply
+);
+
+#[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize, BorshDeserialize)]
+pub struct PumpFunTradeEvent {
+    #[borsh(skip)]
+    pub metadata: EventMetadata,
+    pub mint: Pubkey,
+    pub sol_amount: u64,
+    pub token_amount: u64,
+    pub is_buy: bool,
+    pub user: Pubkey,
+    pub timestamp: i64,
+    pub virtual_sol_reserves: u64,
+    pub virtual_token_reserves: u64,
+    pub real_sol_reserves: u64,
+    pub real_token_reserves: u64,
+    pub fee_recipient: Pubkey,
+    pub fee_basis_points: u64, 
+    pub fee: u64,
+    pub creator: Pubkey,
+    pub creator_fee_basis_points: u64,
+    pub creator_fee: u64,
+    #[borsh(skip)]
+    pub bonding_curve: Pubkey,
+    #[borsh(skip)]
+    pub associated_bonding_curve: Pubkey,
+    #[borsh(skip)]
+    pub associated_user: Pubkey,
+    #[borsh(skip)]
+    pub creator_vault: Pubkey,
+    #[borsh(skip)]
+    pub max_sol_cost: u64,
+    #[borsh(skip)]
+    pub min_sol_output: u64,
+    #[borsh(skip)]
+    pub amount: u64,
+    #[borsh(skip)]
+    pub is_bot: bool,
+    #[borsh(skip)]
+    pub is_dev_create_token_trade: bool, // 是否是dev创建token的交易
+}
+
+impl_unified_event!(
+    PumpFunTradeEvent,
+    mint,
+    sol_amount,
+    token_amount,
+    is_buy,
+    user,
+    timestamp,
+    virtual_sol_reserves,
+    virtual_token_reserves,
+    real_sol_reserves,
+    real_token_reserves,
+    fee_recipient,
+    fee_basis_points,
+    fee,
+    creator,
+    creator_fee_basis_points,
+    creator_fee
+);
+
+/// 事件鉴别器常量
+pub mod discriminators {
+    // 事件鉴别器
+    pub const CREATE_TOKEN_EVENT: &str = "0xe445a52e51cb9a1d1b72a94ddeeb6376";
+    pub const TRADE_EVENT: &str = "0xe445a52e51cb9a1dbddb7fd34ee661ee";
+
+    // 指令鉴别器
+    pub const CREATE_TOKEN_IX: &[u8] = &[24, 30, 200, 40, 5, 28, 7, 119];
+    pub const BUY_IX: &[u8] = &[102, 6, 61, 18, 1, 218, 235, 234];
+    pub const SELL_IX: &[u8] = &[51, 230, 133, 164, 1, 127, 131, 173];
+}