chore: 著作権とライセンスについての情報を各ファイルに追加する (#11348)

* chore: Add the SPDX information to each file

Add copyright and licensing information as defined in version 3.0 of
the REUSE Specification.

* tweak format

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/frontend/src/scripts/popout.ts

@@ -1,5 +1,10 @@
-import * as config from '@/config';
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { appendQuery } from './url';
+import * as config from '@/config';
 
 export function popout(path: string, w?: HTMLElement) {
 	let url = path.startsWith('http://') || path.startsWith('https://') ? path : config.url + path;