Generic Root of a number

[kushsharma1001]

Problem Statement: Find the generic root of a number. The generic root of a number is the sum of all the digits of the number until we get a single-digit output.

Input: 1234
Output: 1
Explanation: 1+2+3+4=10, 1+0 = 1

[kushsharma1001]

Hi,
I have pushed a solution to this issue here: #2534

[kushsharma1001]

/assign @kushsharma1001