Update 0.8.0: Let's go to distend lands

I was finally able to add some new features!

• I reworked the plane teleporter by changing its sprite, new SFX + some background polish.
• If you use the teleporter during the night, on the other side, monsters will spawn as well.
• Implemented a hint + notification manager to help the player.
• The player is notified if they can craft something new. The new item is highlighted in the craft menu. Already crafted items are now permanently displayed in the crafting menu.
• Quests! When you go through a portal, there's a chance that a quest will trigger, giving players the chance to earn some loot.
• The main menu received some new background music, so that it feels a bit more cosy.