.added Easy/evenOrOddNumberOfFactors.cpp file to solve #356

[nssk1999]

solved the problem mention the issue #356 created by me

Description

Create a function that returns "even" if a number has an even number of factors and "odd" if a number has an odd number of factors.

Examples factor_group(33) ➞ "even"

factor_group(36) ➞ "odd"

factor_group(7) ➞ "even"

enter here if you have any details

Program Name - Even or Odd Number of Factors Issue No.- #356

Type issue number after hash(#)

Checklist(self check)

• [x] Yes, this task assigned to me.
• [x] My code follows the style guidelines(Clean Code) of this project
• [x] I have performed a self-review of my own code
• [x] My Filename is in camelCase format
• [x] I have added Problem statement, Problem link in file.