Added memory editing functionality

sia/entry/write_entry.py

@@ -36,6 +36,13 @@ class WriteEntry(Entry):
             self._io_buffer.write(self.content)
             self.written = True
             self.notify_change()
+    
+    def reset(self) -> None:
+        """
+        Reset the entry state to its initial state.
+        """
+        self.written = False
+        self.notify_change()
 
     def generate_context(self) -> ET.Element:
         """
@@ -56,4 +63,5 @@ class WriteEntry(Entry):
             "type": "write",
             "id": self.id,
             "content": self.content,
+            "written": self.written,
         }