Implement boss bomb throwing

[odecay]

Boss bomb attack.
Attack should throw projectile bombs in an arc which land on the ground some distance away, after a short delay or upon collision they should explode causing AOE damage and Knockback state to players in radius.

• Find bomb spritesheet from Jumpy
• Implement state for bosses bomb throw attack
• Add attack to boss YAML

Check bottle throw for projectile reference.

[Zicklag]

Find bomb spritesheet from Jumpy

See the kick_bomb.png and explosion.png in this folder:

https://github.com/fishfolks/jumpy/tree/main/assets/map/elements/item/kick_bomb

[Isaac Turci]

I'll claim this one

[Zicklag]

Oh, FYI there are a couple more explosions here, too:

https://github.com/fishfolk/jumpy/tree/main/old_assets/textures/explosions

Just in case you need a different size.