feat: add Settlement actor type with Overview/Buildings/Inventory tabs

- New TypeDataModel: archetype, territory, renown, currency (gp/sp/cp),
  garrison, underSiege, isCapital, founded, taxNotes, description, notes
- 3-tab ApplicationV2 sheet with drag & drop for building/weapon/armor/equipment
- Currency steppers (+/−), building constructed toggle, qty controls
- LESS-based CSS (settlement-sheet.less) + base.less updated for shared styles
- Full i18n keys in lang/en.json (8 settlement archetypes)
- system.json: registered settlement actor type

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

templates/actor/settlement-inventory.hbs

@@ -0,0 +1,96 @@
+<section data-tab="inventory" data-group="{{tab.group}}" class="tab {{tab.cssClass}}">
+  <p class="settlement-hint">{{localize "OATHHAMMER.Settlement.InventoryHint"}}</p>
+
+  {{#if weapons.length}}
+  <fieldset>
+    <legend>{{localize "OATHHAMMER.Label.Weapons"}}</legend>
+    <ul class="item-list item-list--weapons">
+      <li class="item-list-header">
+        <span></span>
+        <span class="col-name">{{localize "OATHHAMMER.Label.Name"}}</span>
+        <span>{{localize "OATHHAMMER.Label.Type"}}</span>
+        <span></span>
+      </li>
+      {{#each weapons as |weapon|}}
+      <li class="item-entry" data-item-id="{{weapon.id}}" data-item-uuid="{{weapon.uuid}}">
+        <img src="{{weapon.img}}" class="item-img" />
+        <span class="item-name">{{weapon.name}}</span>
+        <span class="item-type">{{weapon.system.weaponType}}</span>
+        <div class="item-actions">
+          <a data-action="edit" data-item-id="{{weapon.id}}" data-item-uuid="{{weapon.uuid}}"><i class="fa-solid fa-edit"></i></a>
+          {{#unless ../isPlayMode}}<a data-action="delete" data-item-id="{{weapon.id}}" data-item-uuid="{{weapon.uuid}}"><i class="fa-solid fa-trash"></i></a>{{/unless}}
+        </div>
+      </li>
+      {{/each}}
+    </ul>
+  </fieldset>
+  {{/if}}
+
+  {{#if armors.length}}
+  <fieldset>
+    <legend>{{localize "OATHHAMMER.Label.Armors"}}</legend>
+    <ul class="item-list item-list--armors">
+      <li class="item-list-header">
+        <span></span>
+        <span class="col-name">{{localize "OATHHAMMER.Label.Name"}}</span>
+        <span>{{localize "OATHHAMMER.Label.Type"}}</span>
+        <span></span>
+      </li>
+      {{#each armors as |armor|}}
+      <li class="item-entry" data-item-id="{{armor.id}}" data-item-uuid="{{armor.uuid}}">
+        <img src="{{armor.img}}" class="item-img" />
+        <span class="item-name">{{armor.name}}</span>
+        <span class="item-type">{{localize armor.system.armorType}}</span>
+        <div class="item-actions">
+          <a data-action="edit" data-item-id="{{armor.id}}" data-item-uuid="{{armor.uuid}}"><i class="fa-solid fa-edit"></i></a>
+          {{#unless ../isPlayMode}}<a data-action="delete" data-item-id="{{armor.id}}" data-item-uuid="{{armor.uuid}}"><i class="fa-solid fa-trash"></i></a>{{/unless}}
+        </div>
+      </li>
+      {{/each}}
+    </ul>
+  </fieldset>
+  {{/if}}
+
+  {{#if equipments.length}}
+  <fieldset>
+    <legend>{{localize "OATHHAMMER.Label.Equipment"}}</legend>
+    <ul class="item-list item-list--equipment">
+      <li class="item-list-header">
+        <span></span>
+        <span class="col-name">{{localize "OATHHAMMER.Label.Name"}}</span>
+        <span>{{localize "OATHHAMMER.Label.Type"}}</span>
+        <span>{{localize "OATHHAMMER.Label.Quantity"}}</span>
+        <span></span>
+      </li>
+      {{#each equipments as |equip|}}
+      <li class="item-entry" data-item-id="{{equip.id}}" data-item-uuid="{{equip.uuid}}">
+        <img src="{{equip.img}}" class="item-img" />
+        <span class="item-name">{{equip.name}}</span>
+        <span class="item-type">{{localize equip.system.itemType}}</span>
+        <span class="item-qty-stepper">
+          {{#unless ../isPlayMode}}
+          <a data-action="adjustQty" data-item-id="{{equip.id}}" data-delta="-1" class="qty-btn">−</a>
+          {{/unless}}
+          <span class="qty-value">{{equip.system.quantity}}</span>
+          {{#unless ../isPlayMode}}
+          <a data-action="adjustQty" data-item-id="{{equip.id}}" data-delta="1" class="qty-btn">+</a>
+          {{/unless}}
+        </span>
+        <div class="item-actions">
+          <a data-action="edit" data-item-id="{{equip.id}}" data-item-uuid="{{equip.uuid}}"><i class="fa-solid fa-edit"></i></a>
+          {{#unless ../isPlayMode}}<a data-action="delete" data-item-id="{{equip.id}}" data-item-uuid="{{equip.uuid}}"><i class="fa-solid fa-trash"></i></a>{{/unless}}
+        </div>
+      </li>
+      {{/each}}
+    </ul>
+  </fieldset>
+  {{/if}}
+
+  {{#unless weapons.length}}
+  {{#unless armors.length}}
+  {{#unless equipments.length}}
+  <p class="no-items">{{localize "OATHHAMMER.Settlement.NoInventory"}}</p>
+  {{/unless}}
+  {{/unless}}
+  {{/unless}}
+</section>