feat(web): create user as admin (#23026)

web/src/lib/modals/UserCreateModal.svelte

@@ -35,6 +35,7 @@
   let name = $state('');
   let shouldChangePassword = $state(true);
   let notify = $state(true);
+  let isAdmin = $state(false);
 
   let quotaSize: string | undefined = $state();
   let isCreatingUser = $state(false);
@@ -67,6 +68,7 @@
           name,
           quotaSizeInBytes,
           notify,
+          isAdmin,
         },
       });
 
@@ -127,6 +129,10 @@
             <HelperText color="danger">{$t('errors.quota_higher_than_disk_size')}</HelperText>
           {/if}
         </Field>
+
+        <Field label={$t('admin.admin_user')}>
+          <Switch bind:checked={isAdmin} />
+        </Field>
       </Stack>
     </form>
   </ModalBody>