fix(Core/Spells): Implement spell_jump_distance (#25023)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

src/server/game/Spells/SpellInfo.h

@@ -401,6 +401,7 @@ public:
     bool _isSpellValid;
     bool _isCritCapable;
     bool _requireCooldownInfo;
+    float JumpDistance;
 
     SpellInfo(SpellEntry const* spellEntry);
     ~SpellInfo();