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

data/spells/create_alcool.json

@@ -5,6 +5,7 @@
   "range": "close",
   "save": "none",
   "base_dc": 10,
+  "cast_time": "standard",
   "effects": [],
   "description": "A cantrip (Create Alcohol, spelled as on the PC sheet) that transforms one liquid per level into an alcoholic drink of equal volume. Utility spell, no combat effect."
 }