feat: Added minimum element from stack at constant time

[S-M-J-I]

Description of Change

Checklist

• [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: