Added Iterative Quick Sort

[sebe324]

Description of Change

I've added an implementation of iterative quick sort. It uses the stack instead of recursion.

Checklist

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

Notes:

[github-actions[bot]]

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[sebe324]

can someone check this pr out? @realstealthninja