⚙️(App): remove unnecessary windows subsystem attribute

This change removes the `windows_subsystem` attribute, which was used to hide the console window on Windows in release builds. This attribute is no longer needed as the application no longer requires this behavior.

Signed-off-by: Benign X <[email protected]>

src/app.rs

@@ -1,5 +1,3 @@
-#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
-
 use crate::any_data::AnyData;
 use crate::common_vec_op::{CodeParser, CommonVecVisualizer, VecLineGen};
 use crate::cus_component::{toggle, CodeEditor};