explode Effects
New field: block_effects - specifies per-block particles. Each block particle is randomly chosen according to weights. A set limit of block particles is spawned each tick from all explosions that tick.
Format: List of entries:
weight: Non-negative integer representing the random weight for this entry being chosen
particle: The particle to spawn
scaling: Optional scaling to apply between explosion center and block position, or 1.0 if not specified
speed: Optional scaling to apply to the speed of the particle, or 1.0 if not specified