refactor: remove deprecated migration files and clean up adminuser resource

Author: SerVitasik

dev-demo/migrations/prisma/sqlite/migrations/20260401085719_add_listed_to_translations/migration.sql

@@ -96,14 +96,6 @@ export default {
           resourceId: 'adminuser',
       }
     },
-    {
-      name: "cars", 
-      type: AdminForthDataTypes.STRING,
-      foreignResource: {
-        resourceId: 'cars_sl',
-        searchableFields: ['model']
-      }
-    },
     {
       name: "avatar",
       type: AdminForthDataTypes.STRING,