📄 Added license-note to every file

frontend/src/lib/play/end.svelte

@@ -1,3 +1,8 @@
+<!--
+  - This Source Code Form is subject to the terms of the Mozilla Public
+  - License, v. 2.0. If a copy of the MPL was not distributed with this
+  - file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  -->
 <script lang="ts">
 	import type { QuizData } from '$lib/quiz_types';
 	import { getLocalization } from '$lib/i18n';

frontend/src/lib/play/join.svelte

@@ -1,3 +1,8 @@
+<!--
+  - This Source Code Form is subject to the terms of the Mozilla Public
+  - License, v. 2.0. If a copy of the MPL was not distributed with this
+  - file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  -->
 <script lang="ts">
 	import { socket } from '$lib/socket';
 	import { onDestroy, onMount } from 'svelte';

frontend/src/lib/play/question.svelte

@@ -1,3 +1,8 @@
+<!--
+  - This Source Code Form is subject to the terms of the Mozilla Public
+  - License, v. 2.0. If a copy of the MPL was not distributed with this
+  - file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  -->
 <script lang="ts">
 	import type { Question } from '$lib/quiz_types';
 	import { socket } from '$lib/socket';

frontend/src/lib/play/show_results.svelte

@@ -1,3 +1,8 @@
+<!--
+  - This Source Code Form is subject to the terms of the Mozilla Public
+  - License, v. 2.0. If a copy of the MPL was not distributed with this
+  - file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  -->
 <script lang="ts">
 	import type { Answer, QuizData } from '$lib/quiz_types';
 	import { getLocalization } from '$lib/i18n';

frontend/src/lib/play/title.svelte

@@ -1,3 +1,8 @@
+<!--
+  - This Source Code Form is subject to the terms of the Mozilla Public
+  - License, v. 2.0. If a copy of the MPL was not distributed with this
+  - file, You can obtain one at https://mozilla.org/MPL/2.0/.
+  -->
 <script lang="ts">
 	export let title: string;
 	export let description: string;