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

src/game/update_field_table.cpp

@@ -36,6 +36,7 @@ static const UFNameEntry kUFNames[] = {
     {"UNIT_FIELD_AURAS", UF::UNIT_FIELD_AURAS},
     {"UNIT_FIELD_AURAFLAGS", UF::UNIT_FIELD_AURAFLAGS},
     {"UNIT_NPC_FLAGS", UF::UNIT_NPC_FLAGS},
+    {"UNIT_NPC_EMOTESTATE", UF::UNIT_NPC_EMOTESTATE},
     {"UNIT_DYNAMIC_FLAGS", UF::UNIT_DYNAMIC_FLAGS},
     {"UNIT_FIELD_RESISTANCES", UF::UNIT_FIELD_RESISTANCES},
     {"UNIT_FIELD_STAT0", UF::UNIT_FIELD_STAT0},
@@ -61,6 +62,7 @@ static const UFNameEntry kUFNames[] = {
     {"PLAYER_SKILL_INFO_START", UF::PLAYER_SKILL_INFO_START},
     {"PLAYER_EXPLORED_ZONES_START", UF::PLAYER_EXPLORED_ZONES_START},
     {"GAMEOBJECT_DISPLAYID", UF::GAMEOBJECT_DISPLAYID},
+    {"GAMEOBJECT_BYTES_1", UF::GAMEOBJECT_BYTES_1},
     {"ITEM_FIELD_STACK_COUNT", UF::ITEM_FIELD_STACK_COUNT},
     {"ITEM_FIELD_DURABILITY", UF::ITEM_FIELD_DURABILITY},
     {"ITEM_FIELD_MAXDURABILITY", UF::ITEM_FIELD_MAXDURABILITY},