Add special TXXX handling for ID3v2

src/misc.ts

@@ -1009,3 +1009,10 @@ export const clearIntervalUnthrottled = (timer: UnthrottledTimerHandle) => {
 		timerId: timer.id,
 	} satisfies UnthrottledTimerMessage);
 };
+
+export const isRecordStringString = (value: unknown): value is Record<string, string> => {
+	return value !== null
+		&& typeof value === 'object'
+		&& Object.getPrototypeOf(value) === Object.prototype
+		&& Object.values(value).every(x => typeof x === 'string');
+};