refactor: localStorageのaccountsはindexedDBで保持するように (#7609)

* accountsストアはindexedDBで保持するように

* fix lint

* fix indexeddb available detection

* remove debugging code

* fix lint

* resolve https://github.com/misskey-dev/misskey/pull/7609/files/ba756204b77ce6e1189b8443e9641f2d02119621#diff-f565878e8202f0037b830c780b7c0932dc1bb5fd3d05ede14d72d10efbc3740c
Firefoxでの動作を改善

* fix lint

* fix lint

* add changelog

src/client/scripts/get-account-from-id.ts

@@ -0,0 +1,7 @@
+import { get } from '@client/scripts/idb-proxy';
+
+export async function getAccountFromId(id: string) {
+	const accounts = await get('accounts') as { token: string; id: string; }[];
+	if (!accounts) console.log('Accounts are not recorded');
+	return accounts.find(e => e.id === id);
+}