fix(repository): Move backend code into subdirectory

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

src/config/default-access-permission.enum.ts

@@ -1,26 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
- *
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-export enum DefaultAccessPermission {
-  NONE = 'none',
-  READ = 'read',
-  WRITE = 'write',
-}
-
-export function getDefaultAccessPermissionOrdinal(
-  permission: DefaultAccessPermission,
-): number {
-  switch (permission) {
-    case DefaultAccessPermission.NONE:
-      return 0;
-    case DefaultAccessPermission.READ:
-      return 1;
-    case DefaultAccessPermission.WRITE:
-      return 2;
-    default:
-      throw Error('Unknown permission');
-  }
-}