Copy role on move (#15745)

* feat(backend): copyOnMoveAccount

* feat(endpoints): copyOnMoveAccount

* feat(frontend): copyOnMoveAccount

* docs(changelog): アカウントのマイグレーション時に古いアカウントからロールをコピーできるようになりました。

* fix: spdx header for migration

* Update locales/ja-JP.yml

* copyOnMoveAccount -> preserveAssignmentOnMoveAccount

* fix: check for preserveAssignmentOnMoveAccount

---------

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

packages/backend/migration/1743558299182-RoleCopyOnMoveAccount.js

@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class RoleCopyOnMoveAccount1743558299182 {
+    name = 'RoleCopyOnMoveAccount1743558299182'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "role" ADD "preserveAssignmentOnMoveAccount" boolean NOT NULL DEFAULT false`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "role" DROP COLUMN "preserveAssignmentOnMoveAccount"`);
+    }
+}