feat: Major refactor with batch processing and performance optimization

- Refactor streaming architecture with modular grpc components
- Add batch processing system with backpressure strategies
- Implement performance monitoring and metrics collection
- Add multi-protocol parser with block metadata support
- Enhance configuration system with preset profiles
- Add parse_tx_events example and update documentation
- Optimize yellowstone_grpc client complexity

src/streaming/grpc/mod.rs

@@ -0,0 +1,25 @@
+// gRPC 相关模块
+pub mod connection;
+pub mod types;
+pub mod subscription;
+pub mod stream_handler;
+pub mod event_processor;
+
+// 重新导出主要类型
+pub use connection::*;
+pub use types::*;
+pub use subscription::*;
+pub use stream_handler::*;
+pub use event_processor::*;
+
+// 从公用模块重新导出
+pub use crate::streaming::common::{
+    StreamClientConfig as ClientConfig,
+    PerformanceMetrics,
+    MetricsManager,
+    EventBatchProcessor as EventBatchCollector,
+    BackpressureStrategy,
+    BatchConfig,
+    BackpressureConfig,
+    ConnectionConfig,
+};