Boss 2

[Justin1L8]

Add Frankenpine, the second boss. Check the boss gdd for details. Eventually, this should be added into level 2-4.

• [x] projectile attack
  • [x] melon
  • [x] grape stem
  • [x] apple core
  • [x] banana peel
• [x] acid spit
• [x] enemy spawning
• [x] animations
• [ ] aura