add -e flag to print, to print the value to stderr (#5935)

* Refactor: make stdout write all and flush as generic function

* support print to stderr

crates/nu-utils/src/lib.rs

@@ -1,5 +1,3 @@
 pub mod utils;
 
-pub use utils::{
-    enable_vt_processing, stdout_write_all_and_flush, stdout_write_all_as_binary_and_flush,
-};
+pub use utils::{enable_vt_processing, stderr_write_all_and_flush, stdout_write_all_and_flush};