Feat: Add sous-type field to Creature sheets (Créature, Démon, Automata)

- Add soustype field to CreatureDataModel
- Add optionsSousTypeCreature to config with localization support
- Add sous-type select dropdown to creature-sheet.hbs header
- Add translation keys to fr.json

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

lang/fr.json

@@ -59,6 +59,8 @@
     "duration": "Durée",
     "details": "Détails",
     "description": "Description",
+    "demon": "Démon",
+    "automata": "Automata",
     "elementaires": "Élémentaires",
     "elementslords": "Seigneurs des Éléments",
     "equipment": "Equipement",