Add customergroup sort with bulk order and locked implicit names.

Reorder via customergroup.order (exact id list → sort 0…n-1); block renaming POS/Lieferanten while still allowing create/update of other groups by name.

src/index.js

@@ -42,6 +42,7 @@ import brandDelete from './store/brand/delete.js';
 import customergroupList from './store/customergroup/list.js';
 import customergroupCreate from './store/customergroup/create.js';
 import customergroupUpdate from './store/customergroup/update.js';
+import customergroupOrder from './store/customergroup/order.js';
 import customergroupDelete from './store/customergroup/delete.js';
 import entityList from './store/entity/list.js';
 import entityGetById from './store/entity/getById.js';
@@ -181,6 +182,7 @@ export default class LibDashStore {
       list: customergroupList(pool),
       create: customergroupCreate(pool),
       update: customergroupUpdate(pool),
+      order: customergroupOrder(pool),
       delete: customergroupDelete(pool),
     };