Implementing String Utility Class

# Introduction

In this challenge, we will be implementing a String Utility Class called StringUtils. The purpose of this class is to provide two static methods that can be used to check if multiple input strings are not null and not empty. This utility class will be useful for developers who want to perform efficient checks for multiple strings without writing lengthy code. By completing this challenge, we will ensure that the StringUtils class is located at a specific path and file name, and we will complete the implementation of the two static methods to accurately check the strings.