Project structure refactor:

- Change package name general_server to gateway
- Changing the structure of directories and packages
- Adding vendor to the project

vendor/golang.org/x/sys/windows/aliases.go

@@ -0,0 +1,12 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build windows
+
+package windows
+
+import "syscall"
+
+type Errno = syscall.Errno
+type SysProcAttr = syscall.SysProcAttr