feat: capture and display all item stat types in tooltips

Previously only the 5 primary stats (Str/Agi/Sta/Int/Spi) were stored,
discarding hit rating, crit, haste, attack power, spell power, resilience,
expertise, armor penetration, MP5, and many others.

Changes:
- Add ItemDef::ExtraStat and ItemQueryResponseData::ExtraStat arrays
- All three expansion parsers (WotLK/TBC/Classic) now capture non-primary
  stat type/value pairs into extraStats instead of silently dropping them
- All 5 rebuildOnlineInventory paths propagate extraStats to ItemDef
- Tooltip now renders each extra stat on its own line with a name lookup
  covering all common WotLK stat types (hit, crit, haste, AP, SP, etc.)
- Also fix Classic/TBC bag-content and bank-bag paths that were missing
  bindType, description propagation from previous commits

include/game/inventory.hpp

@@ -3,6 +3,7 @@
 #include <cstdint>
 #include <string>
 #include <array>
+#include <vector>
 
 namespace wowee {
 namespace game {
@@ -52,6 +53,9 @@ struct ItemDef {
     uint32_t requiredLevel = 0;
     uint32_t bindType = 0;      // 0=none, 1=BoP, 2=BoE, 3=BoU, 4=BoQ
     std::string description;    // Flavor/lore text shown in tooltip (italic yellow)
+    // Generic stat pairs for non-primary stats (hit, crit, haste, AP, SP, etc.)
+    struct ExtraStat { uint32_t statType = 0; int32_t statValue = 0; };
+    std::vector<ExtraStat> extraStats;
 };
 
 struct ItemSlot {

include/game/world_packets.hpp

@@ -1563,6 +1563,9 @@ struct ItemQueryResponseData {
     std::array<ItemSpell, 5> spells{};
     uint32_t bindType = 0;      // 0=none, 1=BoP, 2=BoE, 3=BoU, 4=BoQ
     std::string description;    // Flavor/lore text
+    // Generic stat pairs for non-primary stats (hit, crit, haste, AP, SP, etc.)
+    struct ExtraStat { uint32_t statType = 0; int32_t statValue = 0; };
+    std::vector<ExtraStat> extraStats;
     bool valid = false;
 };