feat: Add beginner-friendly Bubble Sort implementation

[aryanraj0611]

Description of Change

This is a simplified and beginner-friendly implementation of the Bubble Sort algorithm using basic C++ constructs without templates or advanced libraries. It accepts user input directly and is designed for those new to C++ who want to understand how bubble sort works step by step.

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• 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: Added a simplified, beginner-friendly implementation of the Bubble Sort algorithm using basic C++.