Add binding for NSWindow::isDocumentEdited()

Getter for the existing setDocumentEdited() binding.
I've tested both via an in-progress change to tauri-apps/tao

Author: joshchngs

cocoa/src/appkit.rs

@@ -1087,6 +1087,7 @@ pub trait NSWindow: Sized {
     unsafe fn convertRectFromScreen_(self, rect: NSRect) -> NSRect;
 
     // Accessing Edited Status
+    unsafe fn isDocumentEdited(self) -> BOOL;
     unsafe fn setDocumentEdited_(self, documentEdited: BOOL);
 
     // Managing Titles
@@ -1670,6 +1671,10 @@ impl NSWindow for id {
 
     // Accessing Edited Status
 
+    unsafe fn isDocumentEdited(self) -> BOOL {
+        msg_send![self, isDocumentEdited]
+    }
+
     unsafe fn setDocumentEdited_(self, documentEdited: BOOL) {
         msg_send![self, setDocumentEdited:documentEdited]
     }