Hook system improvements

+ Allow assigning multiple hook types to a class.
+ Add hook types, that are executed (almost) on every occasion.

customiwmserver/hooks/webhook.py

@@ -11,8 +11,9 @@ hook = hook_system.hook
 class Login:
     # Different hook types are executed at different places.
     # In this case, the hook is executed when a user logs in.
+    #
     # Check the documentation for more hook types.
-    hook_type = "player_login"
+    hook_type = ["player_login"]
 
-    def __call__(self, *args, **kwargs):
+    def __call__(self, hook_type, *args, **kwargs):
         print("LOGIN HOOK:", args, kwargs)