fix: migrate combat system from d6 to d10 to match official rules

- Change all dice rolls in fight.mjs from d6 to d10
- Implement success counting system (dice >= difficulty) as per Vermine2047 rules
- Add d10 success class to dice that meet or exceed difficulty
- Display success count in confrontation UI
- Update chat message handler to count successes instead of summing dice
- Add comprehensive JSDoc documentation to performTest method
- Add missing French translations for fight tool terms

This corrects a critical inconsistency where fight.mjs was using d6
while the official Vermine2047 rules and the rest of the system (roll.mjs)
use d10 with success counting.

Compatibility: FoundryVTT v11-v14

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

lang/fr.json

@@ -130,6 +130,14 @@
     "error_no_rerolls_left": "Plus de relances possibles",
     "error_select_ability": "Veuillez sélectionner une caractéristique",
     "error_not_enough_self_control": "Pas assez de points de sang-froid",
+    "FightTool": "Outil de combat",
+    "Roll4Fight": "Lancer pour le combat",
+    "Selected": "Sélectionné",
+    "Achievement": "Accomplissement",
+    "Conservation": "Conservation",
+    "ConfrontationHint": "Résolvez la confrontation en sélectionnant des dés",
+    "PurposeTrait": "Trait de but",
+    "SpleenTrait": "Trait de rate",
     "group": "Groupe",
     "abilities": "Caractéristiques",
     "ability": "Caractéristique",