feat(break): introduce an error in the function's response

[tranhoangvuit]

What kind of change does this PR introduce?

Refactor: Add an error to the function's response to make it clearer and easier to identify errors

What is the current behavior?

Please link any relevant issues here.

What is the new behavior?

This is break change: (with old function we will need to add error in response)

	file, err := os.Open("dummy.txt")
	if err != nil {
		panic(err)
	}
	c := storage_go.NewClient(rawUrl, token, map[string]string{})
	resp, err := c.UploadFile("test", "test.txt", file)
	fmt.Println(resp, err)

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