Toggles for item destruction from explosions

[Bumber64]

Is your feature request related to a problem? Please describe.
Explosions (such as from creepers) can destroy loose items on the ground. This could be considered mob griefing, especially if the items were dropped by a dead player.

Describe the solution you'd like
A toggle for item destruction for mob explosions and TNT explosions.

Describe alternatives you've considered
It could be tied to the block griefing toggles instead of adding new ones, although that's less flexible.

[stonar96]

See https://discord.com/channels/80853743897149440/470410381597343753/1077774063709204490. Thus, items are actually protected by regions. Entity damage from creeper explosions is just an exception that must be denied manually.

Also note that this issue is duplicated by #1946. However, #1946 requests a solution that works without having the config option regions.explosion-flags-block-entity-damage to be set to true.