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>

modules/mournblade-cyd2-config.js

@@ -119,6 +119,12 @@ export const MOURNBLADECYD2_CONFIG = {
     { key: "personnage", label: "Personnage" },
     { key: "traitespece", label: "Trait d'espèce" }
   ],
+  optionsSousTypeCreature: [
+    { key: "", label: localizeOrFallback("MNBL.none", "Aucun") },
+    { key: "creature", label: localizeOrFallback("MNBL.creature", "Créature") },
+    { key: "demon", label: localizeOrFallback("MNBL.demon", "Démon") },
+    { key: "automata", label: localizeOrFallback("MNBL.automata", "Automata") }
+  ],
 
   // Configuration des ActiveEffects
   effectTypes: {