add copyright text to all our files

packages/backend/src/models/NoteEdit.ts

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: marie and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { Entity, JoinColumn, Column, ManyToOne, PrimaryColumn, Index } from "typeorm";
 import { id } from './util/id.js';
 import { MiNote } from './Note.js';

packages/backend/src/models/json-schema/note-edit.ts

@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: marie and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export const packedNoteEdit = {
 	type: "object",
 	properties: {