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/misskey-js/src/autogen/types.ts

@@ -5135,6 +5135,8 @@ export type components = {
       /** @example false */
       asBadge: boolean;
       /** @example false */
+      preserveAssignmentOnMoveAccount: boolean;
+      /** @example false */
       canEditMembersByModerator: boolean;
       policies: {
         [key: string]: {
@@ -9392,6 +9394,7 @@ export type operations = {
           /** @default false */
           isExplorable?: boolean;
           asBadge: boolean;
+          preserveAssignmentOnMoveAccount?: boolean;
           canEditMembersByModerator: boolean;
           displayOrder: number;
           policies: Record<string, never>;
@@ -9667,6 +9670,7 @@ export type operations = {
           isAdministrator?: boolean;
           isExplorable?: boolean;
           asBadge?: boolean;
+          preserveAssignmentOnMoveAccount?: boolean;
           canEditMembersByModerator?: boolean;
           displayOrder?: number;
           policies?: Record<string, never>;