Add free-form text to qube for notes, comments, ...

qubesadmin part of adding free-form text to each qube for comments,
notes, descriptions, remarks, reminders, etc.

fixes: QubesOS/qubes-issues#899

Author: alimirjamali

qubesadmin/vm/__init__.py

@@ -394,6 +394,20 @@ def klass(self):
             self._klass = super().klass
         return self._klass
 
+    def get_notes(self) -> str:
+        ''' Get qube notes '''
+        try:
+            response = self.qubesd_call(self._method_dest, 'admin.vm.notes.Get')
+        except qubesadmin.exc.QubesDaemonNoResponseError:
+            raise qubesadmin.exc.QubesPropertyAccessError('notes')
+        return response.decode()
+
+    def set_notes(self, notes: str):
+        ''' Set qube notes '''
+        self.qubesd_call(self._method_dest, 'admin.vm.notes.Set', \
+                payload = str(notes).encode('ascii'))
+
+
 class DispVMWrapper(QubesVM):
     '''Wrapper class for new DispVM, supporting only service call