add: async traits for driver, db, connection, stmt and implement it for DataFusion driver

Signed-off-by: if0ne <[email protected]>

Author: if0ne

rust/core/src/lib.rs

@@ -41,6 +41,7 @@
 
 pub mod constants;
 pub mod error;
+pub mod non_blocking;
 pub mod options;
 pub mod schemas;