fix(spells): backfill casting times for all imported spells

data/spells/hidden_diplomacy.json

@@ -5,6 +5,7 @@
   "range": "close",
   "save": "will",
   "base_dc": 10,
+  "cast_time": "standard",
   "effects": [],
   "description": "As part of casting, you attempt a single Intimidate check to make the target act friendly; its memory of the threats is clouded, so its attitude does not worsen afterward. Will negates. Social effect only: no combat mechanics are modeled."
 }