Make Mob_Griefing More Configurable

As it currently stands, the mob_griefing gamerule is applied too broadly.  If you want to disable Creeper/Ghast explosions or Enderman damage (what most people would actually associate with the term "Griefing"), the cost is EVERY other interesting Mob-Block interaction in the game, PLUS any ability for Mobs to interact with items dropped on the ground.

This locks you out of:

• Villagers farming crops AND picking up items off the ground
• Snow Golems leaving snow trails/fast snow farms
• Foxes farming berry bushes
• Allays picking up items (y'know, their ENTIRE PURPOSE)
• Piglins picking gold up off the ground for automatic bartering farms
• And of today, the ability for mobs to break through Brittle Ice

This list has gotten too diverse to keep under one umbrella gamerule.  Mob_griefing should be more configurable to better reflect players' needs and playstyles.