feat(animation): 452 named constants, 30-phase character animation state machine

Add animation_ids.hpp/cpp with all 452 WoW animation ID constants (anim::STAND,
anim::RUN, anim::FIRE_BOW, ... anim::FLY_BACKWARDS, etc.), nameFromId() O(1)
lookup, and flyVariant() compact 218-element ground→FLY_* resolver.

Expand AnimationController into a full state machine with 20+ named states:
spell cast (directed→omni→cast fallback chain, instant one-shot release),
hit reactions (WOUND/CRIT/DODGE/BLOCK/SHIELD_BLOCK), stun, wounded idle,
stealth animation substitution, loot, fishing channel, sit/sleep/kneel
down→loop→up transitions, sheathe/unsheathe combat enter/exit, ranged weapons
(BOW/GUN/CROSSBOW/THROWN with reload states), game object OPEN/CLOSE/DESTROY,
vehicle enter/exit, mount flight directionals (FLY_LEFT/RIGHT/UP/DOWN/BACKWARDS),
emote state variants, off-hand/pierce/dual-wield alternation, NPC
birth/spawn/drown/rise, sprint aura override, totem idle, NPC greeting/farewell.

Add spell_defines.hpp with SpellEffect (~45 constants) and SpellMissInfo
(12 constants) namespaces; replace all magic numbers in spell_handler.cpp.

Add GAMEOBJECT_BYTES_1 to update field table (all 4 expansion JSONs) and wire
GameObjectStateCallback. Add DBC cross-validation on world entry.

Expand tools/_ANIM_NAMES from ~35 to 452 entries in m2_viewer.py and
asset_pipeline_gui.py. Add tests/test_animation_ids.cpp.

Bug fixes included:
- Stand state 1 was animating READY_2H(27) — fixed to SITTING(97)
- Spell casts ended freeze-frame — add one-shot release animation
- NPC 2H swing probe chain missing ATTACK_2H_LOOSE (polearm/staff)
- Chair sits (states 2/4/5/6) incorrectly played floor-sit transition
- STOP(3) used for all spell casts — replaced with model-aware chain

Data/expansions/classic/update_fields.json

@@ -2,6 +2,7 @@
   "CONTAINER_FIELD_NUM_SLOTS": 48,
   "CONTAINER_FIELD_SLOT_1": 50,
   "GAMEOBJECT_DISPLAYID": 8,
+  "GAMEOBJECT_BYTES_1": 14,
   "ITEM_FIELD_DURABILITY": 48,
   "ITEM_FIELD_MAXDURABILITY": 49,
   "ITEM_FIELD_STACK_COUNT": 14,

Data/expansions/tbc/update_fields.json

@@ -2,6 +2,7 @@
   "CONTAINER_FIELD_NUM_SLOTS": 64,
   "CONTAINER_FIELD_SLOT_1": 66,
   "GAMEOBJECT_DISPLAYID": 8,
+  "GAMEOBJECT_BYTES_1": 17,
   "ITEM_FIELD_DURABILITY": 60,
   "ITEM_FIELD_MAXDURABILITY": 61,
   "ITEM_FIELD_STACK_COUNT": 14,

Data/expansions/turtle/update_fields.json

@@ -2,6 +2,7 @@
   "CONTAINER_FIELD_NUM_SLOTS": 48,
   "CONTAINER_FIELD_SLOT_1": 50,
   "GAMEOBJECT_DISPLAYID": 8,
+  "GAMEOBJECT_BYTES_1": 14,
   "ITEM_FIELD_DURABILITY": 48,
   "ITEM_FIELD_MAXDURABILITY": 49,
   "ITEM_FIELD_STACK_COUNT": 14,

Data/expansions/wotlk/update_fields.json

@@ -2,6 +2,7 @@
   "CONTAINER_FIELD_NUM_SLOTS": 64,
   "CONTAINER_FIELD_SLOT_1": 66,
   "GAMEOBJECT_DISPLAYID": 8,
+  "GAMEOBJECT_BYTES_1": 17,
   "ITEM_FIELD_DURABILITY": 60,
   "ITEM_FIELD_MAXDURABILITY": 61,
   "ITEM_FIELD_STACK_COUNT": 14,
@@ -57,5 +58,6 @@
   "UNIT_FIELD_STAT4": 88,
   "UNIT_FIELD_TARGET_HI": 7,
   "UNIT_FIELD_TARGET_LO": 6,
-  "UNIT_NPC_FLAGS": 82
+  "UNIT_NPC_FLAGS": 82,
+  "UNIT_NPC_EMOTESTATE": 164
 }