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>

templates/roll-dialog.hbs

@@ -0,0 +1,40 @@
+<form class="roll-dialog celestopol">
+  <div class="roll-title">
+    <span class="stat-label">{{statLabel}}</span>
+    <span class="separator">›</span>
+    <span class="skill-label">{{skillLabel}}</span>
+  </div>
+
+  <div class="form-group">
+    <label for="moonPhase">{{localize "CELESTOPOL.Roll.moonPhase"}}</label>
+    <select id="moonPhase" name="moonPhase">
+      {{#each moonPhases as |phase key|}}
+      <option value="{{key}}" {{#if (eq key ../currentMoonPhase)}}selected{{/if}}>
+        {{localize phase.label}} {{#if phase.bonus}}(+{{phase.bonus}}){{else}}(+0){{/if}}
+      </option>
+      {{/each}}
+    </select>
+  </div>
+
+  <div class="form-group">
+    <label for="difficulty">{{localize "CELESTOPOL.Roll.difficulty"}}</label>
+    <select id="difficulty" name="difficulty">
+      {{#each difficulties as |diff key|}}
+      <option value="{{diff.threshold}}" {{#if (eq diff.threshold ../currentDifficulty)}}selected{{/if}}>
+        {{localize diff.label}} ({{diff.threshold}})
+      </option>
+      {{/each}}
+    </select>
+  </div>
+
+  <div class="form-group">
+    <label for="modifier">{{localize "CELESTOPOL.Roll.modifier"}}</label>
+    <input type="number" id="modifier" name="modifier" value="0">
+  </div>
+
+  <div class="dice-preview">
+    <span>{{localize "CELESTOPOL.Roll.nbDice"}}</span>
+    <span class="nb-dice">{{nbDice}}</span>
+    <span>d6</span>
+  </div>
+</form>