extract variables to dedicated file

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

variables.go

@@ -0,0 +1,20 @@
+package main
+
+import "google.golang.org/protobuf/compiler/protogen"
+
+var (
+	reflectPackage         = protogen.GoImportPath("reflect")
+	stringsPackage         = protogen.GoImportPath("strings")
+	fmtPackage             = protogen.GoImportPath("fmt")
+	contextPackage         = protogen.GoImportPath("context")
+	httpPackage            = protogen.GoImportPath("net/http")
+	gorillaMuxPackage      = protogen.GoImportPath("github.com/gorilla/mux")
+	chiPackage             = protogen.GoImportPath("github.com/go-chi/chi/v5")
+	chiMiddlewarePackage   = protogen.GoImportPath("github.com/go-chi/chi/v5/middleware")
+	microApiPackage        = protogen.GoImportPath("github.com/unistack-org/micro/v3/api")
+	microClientPackage     = protogen.GoImportPath("github.com/unistack-org/micro/v3/client")
+	microServerPackage     = protogen.GoImportPath("github.com/unistack-org/micro/v3/server")
+	microClientHttpPackage = protogen.GoImportPath("github.com/unistack-org/micro-client-http/v3")
+	timePackage            = protogen.GoImportPath("time")
+	deprecationComment     = "// Deprecated: Do not use."
+)