Grenades | Throwable weapon

Added

• Added Molotov Cocktails as a new throwable weapon with a custom item texture and flying bottle projectile.
• Added impact fire spread that can ignite nearby ground and entities.
• Added multiple Molotov crafting options using common survival materials.

Changed

• Improved projectile hit handling so Molotovs break more reliably on impact.
• Improved fire placement so ceiling and wall impacts look more natural without placing fire above the impact level.