Add /roll and friend management commands

Roll Command:
- Add /roll, /random, /rnd commands for random number generation
- Support multiple formats: /roll, /roll 100, /roll 1-100, /roll 10 50
- Broadcasts rolls to party/raid with "[Name] rolls X (min-max)" format
- Cap max roll at 10,000 to prevent abuse
- Use MSG_RANDOM_ROLL (0x1FB) bidirectional opcode

Friend Commands:
- Add /friend add <name>, /addfriend <name> to add friends
- Add /friend remove <name>, /removefriend <name> to remove friends
- Support aliases: /delfriend, /remfriend
- Maintain local friends cache mapping names to GUIDs for lookups
- Display status messages for all friend actions:
  - Friend added/removed confirmations
  - Friend online/offline notifications
  - Error messages (not found, already friends, list full, ignoring)

Social Opcodes:
- Add CMSG_ADD_FRIEND (0x69) and SMSG_FRIEND_STATUS (0x68)
- Add CMSG_DEL_FRIEND (0x6A) for friend removal
- Add CMSG_SET_CONTACT_NOTES (0x6B) for friend notes (future use)
- Add CMSG_ADD_IGNORE (0x6C) and CMSG_DEL_IGNORE (0x6D) (future use)

Implementation:
- Add RandomRollPacket builder and RandomRollParser for roll data
- Add AddFriendPacket and DelFriendPacket builders
- Add FriendStatusParser to handle server friend status updates
- Add friendsCache map to store friend name-to-GUID mappings
- Add handleRandomRoll() and handleFriendStatus() packet handlers
- Comprehensive slash command parsing with multiple formats and aliases

include/game/game_handler.hpp

@@ -210,6 +210,14 @@ public:
     void requestPlayedTime();
     void queryWho(const std::string& playerName = "");
 
+    // Social commands
+    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);
+
+    // Random roll
+    void randomRoll(uint32_t minRoll = 1, uint32_t maxRoll = 100);
+
     // ---- Phase 1: Name queries ----
     void queryPlayerName(uint64_t guid);
     void queryCreatureInfo(uint32_t entry, uint64_t guid);
@@ -513,6 +521,10 @@ private:
     void handlePlayedTime(network::Packet& packet);
     void handleWho(network::Packet& packet);
 
+    // ---- Social handlers ----
+    void handleFriendStatus(network::Packet& packet);
+    void handleRandomRoll(network::Packet& packet);
+
     void addCombatText(CombatTextEntry::Type type, int32_t amount, uint32_t spellId, bool isPlayerSource);
     void addSystemChatMessage(const std::string& message);
 
@@ -592,6 +604,9 @@ private:
     std::unordered_map<uint32_t, CreatureQueryResponseData> creatureInfoCache;
     std::unordered_set<uint32_t> pendingCreatureQueries;
 
+    // ---- Friend list cache ----
+    std::unordered_map<std::string, uint64_t> friendsCache;  // name -> guid
+
     // ---- Online item tracking ----
     struct OnlineItemInfo {
         uint32_t entry = 0;