feat: parse and display elemental resistances and race restrictions in item tooltips

- Store holyRes/fireRes/natureRes/frostRes/shadowRes/arcaneRes in ItemQueryResponseData
- Parse resistance fields in WotLK, TBC, and Classic parsers (previously discarded)
- Display non-zero resistances (e.g. "+40 Fire Resistance") in both tooltip paths
- Add getPlayerRace() accessor to GameHandler
- Show race restriction line (e.g. "Races: Blood Elf, Draenei") in both tooltip paths,
  highlighted red when player's race is not allowed
- Useful for fire/nature/frost resist gear (Onyxia, AQ40, Naxx encounters)

include/game/game_handler.hpp

@@ -1135,6 +1135,10 @@ public:
         const Character* ch = getActiveCharacter();
         return ch ? static_cast<uint8_t>(ch->characterClass) : 0;
     }
+    uint8_t getPlayerRace() const {
+        const Character* ch = getActiveCharacter();
+        return ch ? static_cast<uint8_t>(ch->race) : 0;
+    }
     void setPlayerGuid(uint64_t guid) { playerGuid = guid; }
 
     // Player death state

include/game/world_packets.hpp

@@ -1594,6 +1594,12 @@ struct ItemQueryResponseData {
     float damageMax = 0.0f;
     uint32_t delayMs = 0;
     int32_t armor = 0;
+    int32_t holyRes = 0;
+    int32_t fireRes = 0;
+    int32_t natureRes = 0;
+    int32_t frostRes = 0;
+    int32_t shadowRes = 0;
+    int32_t arcaneRes = 0;
     int32_t stamina = 0;
     int32_t strength = 0;
     int32_t agility = 0;