Adding Large Integers

# Introduction

In this project, you will learn how to implement a function that can add two large integers represented as strings. This is a common problem encountered in real-world scenarios, where the built-in JavaScript number data type has limitations in representing and performing arithmetic operations on extremely large numbers.

## Tasks

In this project, you will learn to:

- Set up the project environment and create the necessary files.
- Implement the logic to add two large numbers represented as strings.
- Test the `addBigNum` function with provided examples.
- Explore ways to optimize the solution (optional).

## Achievements

In this project, you will learn:

- How to work with large numbers in JavaScript by representing them as strings.
- Techniques for handling edge cases and ensuring the correctness of the addition operation.
- Strategies for optimizing the performance of the `addBigNum` function.
- Best practices for writing maintainable and readable code.