feat: implémentation complète du système Célestopol 1922 pour FoundryVTT v13

- DataModels (character, npc, anomaly, aspect, attribute, equipment)
- ApplicationV2 sheets (character 5 tabs, npc 3 tabs, 4 item sheets)
- DialogV2 pour les jets de dés avec phase de lune
- Templates Handlebars complets (fiches PJ/PNJ, items, jet, chat)
- Styles LESS → CSS compilé (thème vert foncé / orange CopaseticNF)
- i18n fr.json complet (clés CELESTOPOL.*)
- Point d'entrée fvtt-celestopol.mjs avec hooks init/ready
- Assets : polices CopaseticNF, images UI, icônes items
- Mise à jour copilot-instructions.md avec l'architecture réelle

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

package.json

@@ -0,0 +1,33 @@
+{
+  "name": "fvtt-celestopol",
+  "private": true,
+  "version": "1.0.0",
+  "description": "Système FoundryVTT pour Célestopol 1922",
+  "author": "LeRatierBretonnien / Uberwald",
+  "license": "UNLICENSED",
+  "main": "gulpfile.js",
+  "devDependencies": {
+    "@eslint/js": "^9.8.0",
+    "@foundryvtt/foundryvtt-cli": "^1.0.2",
+    "commander": "^11.1.0",
+    "eslint": "^9.9.0",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-jsdoc": "^48.11.0",
+    "eslint-plugin-prettier": "^5.2.1",
+    "globals": "^15.9.0",
+    "less": "^4.1.3",
+    "prettier": "^3.3.3"
+  },
+  "dependencies": {
+    "gulp": "^5.0.0",
+    "gulp-less": "^5.0.0"
+  },
+  "scripts": {
+    "build": "gulp css",
+    "watch": "gulp"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://www.uberwald.me/gitea/uberwald/fvtt-celestopol.git"
+  }
+}