Name collider fields for "effects" / misc.

[Dragorn421]

Natural continuation to collider cleanup ( #1427 #1637 ), and some names based on feedback deriving from #1601 (comment)

Names are Best I Could Think Of ™️ , comments and discussion is, as per usual, very welcome!

• rename Collider.colType / COLTYPE_ -> Collider.colMaterial / COL_MATERIAL_
• rename ColliderElement.elemType / ELEMTYPE_ -> ColliderElement.elemMaterial / ELEM_MATERIAL_
• rename CollisionCheckInfo.[at|ac]HitEffect -> CollisionCheckInfo.player[AT|AC]HitReaction
• rename ColliderElementDamageInfoAT.effect to ColliderElementDamageInfoAT.playerACHitReaction and similar with dmgInfoAC/playerAT
  • add PLAYER_AT_HIT_, PLAYER_AC_HIT_ enums for these fields' values
    • right now only used in a few collider init data for demonstration: ObjBombiwa, EnVali
  • note: this puts an AC-named constant in "AT" data which is very confusing, but I don't have a better idea at present
• update a few related comments for docs
• note: did not rename ColliderElementDamageInfo[AT|AC].dmgFlags nor CollisionCheckInfo.damageEffect (in contrary to some prior discussion) (because no idea)

[Dragorn421]

The interesting review bits among all the CtrL+Shift+H noise are:

• include/z64actor.h
• include/z64collision_check.h
• CollisionCheck_SetATvsAC in src/code/z_collision_check.c for the player[AT|AC]HitReaction logic
• sCylinderInit in z_obj_bombiwa.c, and sQuadInit, sCylinderInit in z_en_vali.c, as demonstration for PLAYER_[AC|AT]_HIT_REACTION_ usage (which aren't used in all collider init data everywhere right now)
• z_player.c with the only uses of player[AT|AC]HitReaction