Pewpew

Additions

• Guns with firingMode: projectile can now be explosive. Add an explosive: block for a rocket launcher that detonates on impact (blastRadius, explosionDamage, explosionKnockback), with optional block damage and terrain rebuild.
• Added grenade launchers via payload: <throwable_id> the round flies as that throwable's model and inherits its fuse and effect (explosion, smoke, flash, poison, fire).
• Added projectileModel to change how a bullet looks in flight (e.g. minecraft:fire_charge), and trajectory: FLAT|ARC to control projectile drop.
• Added the PewpewGunExplodeEvent API and matching on pewpew gun explode: Skript event, with editable pewpew damage.