chore: add missing REUSE headers

Signed-off-by: Jonas <jonas@freesources.org>

Author: mejo-

eslint.config.js

@@ -1,3 +1,8 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
 import { recommended } from '@nextcloud/eslint-config'
 import pluginCypress from 'eslint-plugin-cypress'
 import { defineConfig, globalIgnores } from 'eslint/config'

src/TextEditorEmbed.ts

@@ -1,3 +1,8 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
 import type { EventHandler } from '@nextcloud/event-bus'
 import type { Editor } from '@tiptap/core'
 import type { Node } from '@tiptap/pm/model'

src/createTable.ts

@@ -1,3 +1,8 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
 import type { TextEditorEmbed } from './TextEditorEmbed.ts'
 
 import { createApp, defineAsyncComponent, h, reactive, useTemplateRef } from 'vue'

src/tests/testHelpers/testEditor.ts

@@ -1,3 +1,8 @@
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
 import type { Extensions } from '@tiptap/core'
 import type { Doc } from 'yjs'