fixup! feat(writer): add delta writer (#18)

add missing pub use

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

Author: xxchan

crates/iceberg/src/writer/function_writer/mod.rs

@@ -17,5 +17,6 @@
 
 //! This module contains the functional writer.
 
+pub mod equality_delta_writer;
 pub mod fanout_partition_writer;
 pub mod precompute_partition_writer;