fix: Correct critical bugs and complete Creature/Group DataModel implementation

- Fix TypeError: controls.find is not a function in hooks.mjs
- Fix undefined 'npc' variable in applications.mjs
- Fix CONFIG.VERMINE.model undefined by checking game.system.template existence
- Fix TypeError: html.find(...).forEach is not a function in roll.mjs
- Fix Cannot set properties of undefined (setting 'initial') in actor.mjs
- Fix Cannot read properties of undefined (reading 'difficulty') in actor.mjs
- Fix ActiveEffect application phase 'initial' already completed by adding combatStatus to base template
- Fix Missing helper: 'select' in roll-dialog.hbs (removed invalid Handlebars select block)
- Add SIZE_LEVELS labels to creatureSizeLevels config
- Add SIZE_LEVELS translations to fr.json
- Add combatStatus to base actor template
- Convert all .html templates to .hbs for Foundry v14 compatibility
- Update item-sheet.mjs to use .hbs extension
- Update handlebars-manager.mjs to use .hbs for all partials

Complete Vermine2047 Creature and Group sheet implementation:
- Creature: Pattern, Size, Role, Pack with computed values
- Group: Totem, Reserve, Morale, Objectives, Members management
- All templates functional with proper styling

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

templates/item/item-background-sheet.hbs

@@ -0,0 +1,43 @@
+<form
+  class="{{cssClass}}"
+  autocomplete="off"
+>
+  <header class="sheet-header">
+    <img
+      class="profile-img"
+      src="{{item.img}}"
+      data-edit="img"
+      title="{{item.name}}"
+    />
+    <div class="header-fields">
+      <h1 class="charname"><input
+          name="name"
+          type="text"
+          value="{{item.name}}"
+          placeholder="Name"
+        /></h1>
+    </div>
+  </header>
+  {{!-- Sheet Body --}}
+  <section class="sheet-body ">
+    <h4 class="resource-label flexrow">
+      <label class="resource-label">{{ localize "ITEMS.cost"}}</label>
+      <span class="hexa">
+        <input
+          type="number"
+          name="system.cost"
+          value="{{system.cost }}"
+          data-dtype="Number"
+          min="1"
+          max="2"
+        />
+      </span>
+    </h4>
+    <h4>description</h4>
+    {{editor system.description target="system.description" rollData=rollData button=true owner=owner editable=editable}}
+
+    </div>
+
+  </section>
+
+</form>