[feature] missing chunking on excessive death / shattering

[lynxlynxlynx]

When an overkill occurs, a petrified or frozen enemy is damaged, the actor is gibbed. We support this, but there is no visual feedback.

Info from kjeron:

Chunking causes a permanent animation change (to EXPLODING_TORSO animation) and a (hair/skin/major/minor) color change (all to a red color). It depends on the death type.
Chunked Death and Destruction Death result in animation [0x230][EXPLODING_TORSO], and set all color indexes to 70.

The explosion is a mix of all the EXPLODING_PART animations, in relatively bipedal quantities.
I don't know exactly what generates the "explosion", but it is similar to that created by projectiles using a "Fragments Animation", like "TRAPSNAR.PRO". Change it to "EXPLODING_TORSO" and you will see a similar explosion (just with more body parts and no variety).

[0x200][EXPLODING_ARM], [0x210][EXPLODING_HEAD], [0x220][EXPLODING_FOOT], [0x230][EXPLODING_TORSO], and [0x240][EXPLODING_LEG] all use the various cycles of "SPBLOOD.BAM". Arm is cycle 1, head is cycle 2, leg is cycle 3, torso is cycle 4, leg is cycle 5.
The "explosion" is rather unique, as it actually causes the creature to "jump" in place, which can be seen if you reset the animation during the explosion.

Exploding Stone and Exploding Frozen Death result in animation [0x100][CHUNKS], and set all color indexes to 72(stone) or 71(ice). It uses "SPCHUNKS.BAM"

Chunk coloring was also supposed to be animation tied, but maybe for some other chunks (like what??) or for gibbing critters with non-default blood colors (bloodclr.2da). extanim.2da has COLOR_CHUNKS, but only one entry. Green skeletons in iwd2 Kuldahar already get recolored nicely, so it looks like there's nothing left to be done wrt colors besides handling SPCHUNKS palettes (and itself, since we now always use SPBLOOD).

Actor::ChunkActor should likely call Map::Sparkle to animate the particles, but the explosion fragment mode (or a new one) needs to be added first. See PAF_FRAGMENT and fragments in Particles.h (finish implementation) and SPARKLE_EXPLOSION, which is likely the same reason for #141 . Otherwise there is no fountain of flesh and the chunks all appear unanimated in the same spot.

some iwd2 logic: https://github.com/alexbatalov/iwd2-re/blob/main/src/CGameAnimationTypeEffect.cpp#L33
some nice examples (even bouncing): https://youtu.be/3AqKKJnGS08?si=bmYj7GFW3_85xoqE&t=312