feat: Add Jenkins Lookup3 hash function

[cptr0]

Description of Change

I implemented the Jenkins Lookup3 hash function in C.
This includes the hashing function, an example usage, and a test. The implementation follows the algorithm described on the Wikipedia page (linked below).
https://en.wikipedia.org/wiki/Jenkins_hash_function

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.

[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!

[cptr0]

@Panquesito7 @tjgurwara99 @alexpantyukhin
Hi! Could someone review this when they have time?