Refactor file loading to detect external modifications and add reload capability

- Extract _load_data() method from load_path() for reuse in reload()
- Add is_extters externally_modified() to track file state changes (mtime/size)
- Replace load_bytes() with load_contents() for better error handling
- Add reload() method to re-read file from disk
- Fix file_state_watcher by properly detecting external changes

plugins/code/event-watchers/file_state_watcher/watcher_checks.py

@@ -10,23 +10,45 @@ from libs.event_factory import Event_Factory, Code_Event_Types
 
 
 
-def file_is_deleted(event, emit):
-    event.file.was_deleted = True
+def ask_yes_no(message):
+    dialog = Gtk.MessageDialog(
+        parent       = None,
+        flags        = 0,
+        message_type = Gtk.MessageType.QUESTION,
+        buttons      = Gtk.ButtonsType.YES_NO,
+        text         = message,
+    )
+    dialog.set_title("Confirm")
+
+    response = dialog.run()
+    dialog.destroy()
+
+    return response == Gtk.ResponseType.YES
+
+
+def file_is_deleted(file, emit):
+    file.was_deleted = True
     event = Event_Factory.create_event(
         "file_externally_deleted",
-        file   = event.file,
-        buffer = event.buffer
+        file   = file,
+        buffer = file.buffer
     )
     emit(event)
 
 
-def file_is_externally_modified(event, emit):
-#    event = Event_Factory.create_event(
-#        "file_externally_modified",
-#        file   = event.file,
-#        buffer = event.buffer
-#    )
-#    emit(event)
+def file_is_externally_modified(file, emit):
+    event = Event_Factory.create_event(
+        "file_externally_modified",
+        file   = file,
+        buffer = file.buffer
+    )
+    emit(event)
 
-    ...
+    if not file.buffer.get_modified():
+        file.reload()
+        return
 
+    result = ask_yes_no("File has been externally modified. Reload?")
+    if not result: return
+
+    file.reload()