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/misc/simple-schema.ts

@@ -0,0 +1,15 @@
+export interface SimpleSchema {
+	type: 'boolean' | 'number' | 'string' | 'array' | 'object' | 'any';
+	nullable: boolean;
+	optional: boolean;
+	items?: SimpleSchema;
+	properties?: SimpleObj;
+	description?: string;
+	example?: any;
+	format?: string;
+	ref?: string;
+	enum?: string[];
+	default?: boolean | null;
+}
+
+export interface SimpleObj { [key: string]: SimpleSchema; }