Add Tier 1 utility commands: ignore, sit/stand, and logout

Ignore Commands:
- Add /ignore <name> to block messages from players
- Add /unignore <name> to unblock players
- Maintain ignoreCache for name-to-GUID lookups
- Show confirmation and error messages for ignore actions
- Use CMSG_ADD_IGNORE (0x6C) and CMSG_DEL_IGNORE (0x6D)

Sit/Stand/Kneel Commands:
- Add /sit to sit down (stand state 1)
- Add /stand to stand up (stand state 0)
- Add /kneel to kneel (stand state 8)
- Instant visual feedback with CMSG_STAND_STATE_CHANGE (0x101)
- Support for additional stand states (chair, sleep, etc.)

Logout Commands:
- Add /logout and /camp to initiate logout with countdown
- Add /cancellogout to cancel pending logout
- Show "Logging out in 20 seconds..." or "Logout complete" messages
- Track logout state with loggingOut_ flag to prevent duplicate requests
- Handle instant logout (in inn/city) vs countdown logout
- Use opcodes:
  - CMSG_LOGOUT_REQUEST (0x4B)
  - CMSG_LOGOUT_CANCEL (0x4E)
  - SMSG_LOGOUT_RESPONSE (0x4C)
  - SMSG_LOGOUT_COMPLETE (0x4D)

Implementation:
- Add LogoutRequestPacket, LogoutCancelPacket builders
- Add LogoutResponseParser to parse server logout responses
- Add StandStateChangePacket builder for stance changes
- Add AddIgnorePacket and DelIgnorePacket for ignore list management
- Add handleLogoutResponse() and handleLogoutComplete() handlers
- Add ignoreCache map and loggingOut_ state tracking
- All commands display feedback in chat window

include/game/game_handler.hpp

@@ -214,10 +214,19 @@ public:
     void addFriend(const std::string& playerName, const std::string& note = "");
     void removeFriend(const std::string& playerName);
     void setFriendNote(const std::string& playerName, const std::string& note);
+    void addIgnore(const std::string& playerName);
+    void removeIgnore(const std::string& playerName);
 
     // Random roll
     void randomRoll(uint32_t minRoll = 1, uint32_t maxRoll = 100);
 
+    // Logout commands
+    void requestLogout();
+    void cancelLogout();
+
+    // Stand state
+    void setStandState(uint8_t state);  // 0=stand, 1=sit, 2=sit_chair, 3=sleep, 4=sit_low_chair, 5=sit_medium_chair, 6=sit_high_chair, 7=dead, 8=kneel, 9=submerged
+
     // ---- Phase 1: Name queries ----
     void queryPlayerName(uint64_t guid);
     void queryCreatureInfo(uint32_t entry, uint64_t guid);
@@ -525,6 +534,10 @@ private:
     void handleFriendStatus(network::Packet& packet);
     void handleRandomRoll(network::Packet& packet);
 
+    // ---- Logout handlers ----
+    void handleLogoutResponse(network::Packet& packet);
+    void handleLogoutComplete(network::Packet& packet);
+
     void addCombatText(CombatTextEntry::Type type, int32_t amount, uint32_t spellId, bool isPlayerSource);
     void addSystemChatMessage(const std::string& message);
 
@@ -607,6 +620,12 @@ private:
     // ---- Friend list cache ----
     std::unordered_map<std::string, uint64_t> friendsCache;  // name -> guid
 
+    // ---- Ignore list cache ----
+    std::unordered_map<std::string, uint64_t> ignoreCache;  // name -> guid
+
+    // ---- Logout state ----
+    bool loggingOut_ = false;
+
     // ---- Online item tracking ----
     struct OnlineItemInfo {
         uint32_t entry = 0;