feat(rendering): implement spell visual effects with bone-tracked ribbons and particles

Add complete spell visual pipeline resolving the DBC chain
(Spell → SpellVisual → SpellVisualKit → SpellVisualEffectName → M2)
with precast/cast/impact phases, bone-attached positioning, and
automatic dual-hand mirroring.

Ribbon rendering fixes:
- Parse visibility track as uint8 (was read as float, suppressing
  all ribbon edges due to ~1.4e-45 failing the >0.5 check)
- Filter garbage emitters with bone=UINT_MAX unconditionally
- Guard against NaN spine positions from corrupt bone data
- Resolve ribbon textures via direct index, not textureLookup table
- Fall back to bone 0 when ribbon bone index is out of range

Particle rendering fixes:
- Reduce spell particle scale from 5x to 1.5x (was oversized)
- Exempt spell effect instances from position-based deduplication

Spell handler integration:
- Trigger precast visuals on SMSG_SPELL_START with server castTimeMs
- Trigger cast/impact visuals on SMSG_SPELL_GO
- Cancel precast visuals on cast interrupt/failure/movement

M2 classifier expansion:
- Add AmbientEmitterType enum for sound system integration
- Add 20+ foliage tokens, 4 spell effect tokens, isSmallFoliage flag
- Add markModelAsSpellEffect() to override disableAnimation

DBC layouts:
- Add SpellVisualID field to Spell.dbc for all expansion configs

Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>

Data/expansions/turtle/dbc_layouts.json

@@ -213,6 +213,7 @@
     "RangeIndex": 33,
     "Rank": 129,
     "SchoolEnum": 1,
+    "SpellVisualID": 115,
     "Tooltip": 147
   },
   "SpellIcon": {
@@ -230,7 +231,8 @@
     "CastKit": 2,
     "ID": 0,
     "ImpactKit": 3,
-    "MissileModel": 8
+    "MissileModel": 8,
+    "PrecastKit": 1
   },
   "SpellVisualEffectName": {
     "FilePath": 2,
@@ -238,7 +240,12 @@
   },
   "SpellVisualKit": {
     "BaseEffect": 5,
+    "BreathEffect": 8,
+    "ChestEffect": 4,
+    "HeadEffect": 3,
     "ID": 0,
+    "LeftHandEffect": 6,
+    "RightHandEffect": 7,
     "SpecialEffect0": 11,
     "SpecialEffect1": 12,
     "SpecialEffect2": 13