Add some number identifying programs

[itsyourap]

Description: This PR will add some basic number related identification problems. (closes #73)

Changes Made: Added some number identifying programs

• Armstrong number
• Palindrome number
• Prime number
• Krishnamurthy number
• Happy number
• Automorphic number
• Kaprekar number
• Unique number
• Pronic number

Testing Done:

• Armstrong number
  • 153 -> true
  • 123 -> false
• Palindrome number
  • 1221 -> true
  • 1732 -> false
• Prime number
  • 17 -> true
  • 12 -> false
• Krishnamurthy number
  • 145 -> true
  • 122 -> false
• Happy number
  • 19 -> true
  • 12 -> false
• Automorphic number
  • 25 -> true
  • 12 -> false
• Kaprekar number
  • 45 -> true
  • 32 -> false
• Unique number
  • 1234 -> true
  • 1223 -> false
• Pronic number
  • 56 -> true
  • 13 -> false

Additional Notes: These are some basic number programs which will help the newcomers in the world of programming.

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By submitting this PR, I confirm that my contributions are made under the terms of the MIT License.

Kindly merge this PR

[tangorishi]

kindly use the pr template given in the readme.md file also create an issue for the same and get it assigned to yourself

[itsyourap]

kindly use the pr template given in the readme.md file also create an issue for the same and get it assigned to yourself

Sorry for the oversight. Done now

[tangorishi]

@itsyourap kindly store all these codes in a separate folder inside FirstContribution folder.

[itsyourap]

@itsyourap kindly store all these codes in a separate folder inside FirstContribution folder.

Yes. All of them are already stored in a folder named "Numbers" inside the "FirstContribution" folder

[tangorishi]

Good Work @itsyourap kudos for merging your pr under hacktoberfest 2023.

[itsyourap]

Thanks a lot @tangorishi ❤️🙌