Save and Load Settings

Write saveSettings(settings) that stores the object under key "settings" as JSON, and loadSettings() that reads it back and returns the object (default { theme: "light" } when nothing is stored). Save { theme: "dark", fontSize: 16 }, then log the loaded theme (should be dark). Rules: - storage is provided (same API as localStorage). - JSON.stringify on the way in, JSON.parse on the way out.

Difficulty: beginner