refactor: Expand schema (#7772)

* packedNotificationSchemaを更新

* read:gallery, write:gallery, read:gallery-likes, write:gallery-likesに翻訳を追加

* fix

* add header, choice, invitation

* test

* fix

* yatta

* remove no longer needed "as PackedUser/PackedNote"

* clean up

* add simple-schema

* fix lint

* define items in full Schema

* revert https://github.com/misskey-dev/misskey/pull/7772#discussion_r706627736

* user packとnote packの型不整合を修正

src/models/repositories/notification.ts

@@ -136,7 +136,7 @@ export const packedNotificationSchema = {
 		},
 		user: {
 			type: 'object' as const,
-			ref: 'User',
+			ref: 'User' as const,
 			optional: true as const, nullable: true as const,
 		},
 		userId: {
@@ -146,7 +146,7 @@ export const packedNotificationSchema = {
 		},
 		note: {
 			type: 'object' as const,
-			ref: 'Note',
+			ref: 'Note' as const,
 			optional: true as const, nullable: true as const,
 		},
 		reaction: {