Add JWT generation, creation and validation along with tests

- from arieshi255/SnowcloakUtils

global/global.go

@@ -6,6 +6,10 @@ import (
 	"math/rand"
 )
 
+type SnowcloakConfigurationBase struct {
+	Jwt string
+}
+
 func GenerateRandomString(length int) string {
 	// C# had optional parameters that allowed lowercase for chardata and gpose lobbies, Go doesn't.
 	// We can probably get away with just uppercase.