Added new mini game: Hunger Games: Sky Islands

- A new mine game combining Hunger Games intensity with Sky Wars–style flying. Players spawn on floating islands with elytra, loot fast, and fight as the zone closes toward the center.

- Vertical Combat & Fast Matches

- Use aerial movement, island-to-island battles, and risky mid-air fights. The last surviving player wins.

Minor UI improvements, bug fixes, and stability updates.