plugin: allow plugins to write to other storages

edmond/plugin.py

@@ -105,12 +105,13 @@ class Plugin:
             ns = self.name
         return self.bot.storage.get(ns, {}).get(key, default)
 
-    def set_storage_value(self, key, value):
+    def set_storage_value(self, key, value, ns=None):
         """Set a value in the plugin persistent storage."""
-        if self.name not in self.bot.storage:
-            self.bot.storage[self.name] = {key: value}
+        name = ns or self.name
+        if name not in self.bot.storage:
+            self.bot.storage[name] = {key: value}
         else:
-            self.bot.storage[self.name][key] = value
+            self.bot.storage[name][key] = value
 
     def append_storage_list_value(self, key, value):
         """Append a value to a list in the plugin persistent storage."""