rename grpc to streaming

src/streaming/mod.rs

@@ -0,0 +1,8 @@
+pub mod yellow_stone;
+pub mod yellow_stone_sub_system;    
+pub mod shred_stream;
+pub mod event_parser;
+
+pub use yellow_stone::YellowstoneGrpc;
+pub use yellow_stone_sub_system::{SystemEvent, TransferInfo};
+pub use shred_stream::ShredStreamGrpc;