Explosive Arrow Mod Notes

• Added an Explosive Arrow item that behaves like a normal arrow but detonates with a TNT-style explosion when it hits a block or entity. The explosion uses the shooter as the source so damage/credit behaves like TNT you triggered.
• Custom projectile entity and renderer keep the arrow visible in flight while swapping the pickup item to the explosive arrow.
• Crafting recipe: shaped pattern with TNT above, below, left, and right of an arrow in the center (TNT cross). Produces 4 explosive arrows in the combat category.
• Creative inventory: the explosive arrow appears in the Combat tab for easy access.

Known notes and ideas:

• The arrow reuses the vanilla arrow texture; add a custom texture if you want a unique look.
• Explosion strength matches TNT (radius 4). Adjust in code if you want a different blast size or block-damage rules.