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/world_packets.hpp

@@ -736,6 +736,56 @@ public:
     static bool parse(network::Packet& packet, FriendStatusData& data);
 };
 
+/** CMSG_ADD_IGNORE packet builder */
+class AddIgnorePacket {
+public:
+    static network::Packet build(const std::string& playerName);
+};
+
+/** CMSG_DEL_IGNORE packet builder */
+class DelIgnorePacket {
+public:
+    static network::Packet build(uint64_t ignoreGuid);
+};
+
+// ============================================================
+// Logout Commands
+// ============================================================
+
+/** CMSG_LOGOUT_REQUEST packet builder */
+class LogoutRequestPacket {
+public:
+    static network::Packet build();
+};
+
+/** CMSG_LOGOUT_CANCEL packet builder */
+class LogoutCancelPacket {
+public:
+    static network::Packet build();
+};
+
+/** SMSG_LOGOUT_RESPONSE data */
+struct LogoutResponseData {
+    uint32_t result = 0;  // 0 = success, 1 = failure
+    uint8_t instant = 0;  // 1 = instant logout
+};
+
+/** SMSG_LOGOUT_RESPONSE parser */
+class LogoutResponseParser {
+public:
+    static bool parse(network::Packet& packet, LogoutResponseData& data);
+};
+
+// ============================================================
+// Stand State
+// ============================================================
+
+/** CMSG_STAND_STATE_CHANGE packet builder */
+class StandStateChangePacket {
+public:
+    static network::Packet build(uint8_t state);
+};
+
 // ============================================================
 // Random Roll
 // ============================================================