feat: added krishnamurthy number verificator

[jspmic]

Description of Change

• Created an implementation of the krishnamurthy number verificator
• Added test cases

References

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added tests and example, test must pass
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes:

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[realstealthninja]

Thank you for your contributions please refer to the contribution guidelines to fix you documentation format of source code.
every file should be documented with a heading multi-line comment
containing references and descriptions of the given algorithm

[github-actions]

Please ping one of the maintainers once you commit the changes requested or make improvements on the code. If this is not the case and you need some help, feel free to ask for help in our Gitter channel or our Discord server. Thank you for your contributions!