fix: Useragent package build issue for windows (#91)

Author: alexluong

internal/sdkclient/uname_windows.go

@@ -0,0 +1,10 @@
+//go:build windows
+// +build windows
+
+package sdkclient
+
+func getUname() string {
+	// TODO: if there is appetite for it in the community
+	// add support for Windows GetSystemInfo
+	return ""
+}