Add /inspect command to view player equipment

- Add CMSG_INSPECT (0x114) and SMSG_INSPECT_RESULTS (0x115) opcodes
- Implement InspectPacket builder for sending inspect requests
- Add inspectTarget() method to GameHandler with validation
- Add /inspect slash command in chat system
- Validate target is a player before sending inspect request
- Show helpful error messages for invalid inspect attempts
- Display confirmation message when inspect request is sent

src/ui/game_screen.cpp

@@ -956,6 +956,13 @@ void GameScreen::sendChatMessage(game::GameHandler& gameHandler) {
                 return;
             }
 
+            // /inspect command
+            if (cmdLower == "inspect") {
+                gameHandler.inspectTarget();
+                chatInputBuffer[0] = '\0';
+                return;
+            }
+
             // Chat channel slash commands
             bool isChannelCommand = false;
             if (cmdLower == "s" || cmdLower == "say") {