Fix Linux compilation errors for LoginServer

Major fixes for Linux compatibility:
- Added comprehensive Linux socket type definitions to stdafx.h
- Created SocketOpsLinux.cpp with Linux socket operations implementation
- Added ListenSocketLinux.h with epoll-based socket listening
- Updated Network.h to conditionally include platform-specific headers
- Modified SocketDefines.h to support both Windows OVERLAPPED and Linux equivalents
- Updated CMakeLists.txt to use correct platform-specific source files
- Added additional socket constants and error code mappings for Linux

These changes address the compilation errors related to:
- Missing SOCKET, HANDLE, OVERLAPPED type definitions
- Windows-specific socket functions (WSASocket, closesocket, etc.)
- Platform-specific listen socket implementations
- Socket operations and error handling

The LoginServer should now compile successfully on Linux while maintaining Windows compatibility.

server/LogInServer/CMakeLists.txt

@@ -68,6 +68,10 @@ if(WIN32)
         ../shared/SocketWin32.cpp
         ../shared/SocketOpsWin32.cpp
     )
+else()
+    list(APPEND SHARED_SOURCES
+        ../shared/SocketOpsLinux.cpp
+    )
 endif()
 
 # Create executable