add extraFields optional param on toPrivateUser, expose rights on READY

src/gateway/opcodes/Identify.ts

@@ -519,7 +519,7 @@ export async function onIdentify(this: WebSocket, data: Payload) {
 	const d: ReadyEventData = {
 		v: 9,
 		application: application ? { id: application.id, flags: application.flags } : undefined,
-		user: user.toPrivateUser(),
+		user: user.toPrivateUser(["rights"]),
 		user_settings: user.settings,
 		user_settings_proto: settingsProtos?.userSettings ? PreloadedUserSettings.toBase64(settingsProtos.userSettings) : undefined,
 		user_settings_proto_json: settingsProtos?.userSettings ? PreloadedUserSettings.toJson(settingsProtos.userSettings) : undefined,

src/util/entities/User.ts

@@ -197,10 +197,10 @@ export class User extends BaseClass {
 		return user as PublicUser;
 	}
 
-	toPrivateUser() {
+	toPrivateUser(extraFields: (keyof User)[] = []) {
 		// eslint-disable-next-line @typescript-eslint/no-explicit-any
 		const user: any = {};
-		PrivateUserProjection.forEach((x) => {
+		[...PrivateUserProjection, ...extraFields].forEach((x) => {
 			user[x] = this[x];
 		});
 		return user as UserPrivate;