Configurable hulk hammer seismic wave block transformations

Currently, the hulk hammer is hard-coded to turn grass-type blocks into dirt. It would be nice if there was a config option to set block transformations (or perhaps a crafttweaker event for even more customizability). For instance, this would let you turn stone bricks into their cracked variant, or perhaps stone into gravel/cobblestone.

Start by locating the hulk hammer's seismic wave block-transformation logic. Review how configuration and CraftTweaker integration are handled elsewhere in the mod before choosing between a configurable mapping and an event. Done means transformations can be customized for examples such as stone bricks to cracked stone bricks or stone to gravel/cobblestone, with the chosen behavior documented and tested.

Written by the indexing model from the issue text.