Add sorting folder with Bubble, Selection, and Insertion Sort algorithms in C++

[PrakashShukla0907]

This pull request introduces a new folder CPP/sorting/ containing three fundamental sorting algorithms implemented in C++:
bash

CPP/sorting/
├── bubble_sort.cpp
├── insertion_sort.cpp
└── selection_sort.cpp

Details of each file:

• bubble_sort.cpp – Implements the Bubble Sort algorithm.
• insertion_sort.cpp – Implements the Insertion Sort algorithm.
• selection_sort.cpp – Implements the Selection Sort algorithm.

These implementations are beginner-friendly and follow a consistent structure to serve as reference examples for sorting algorithms in C++.

All files are organized under the CPP/sorting/ directory for clarity and easy navigation.

[github-actions]

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[github-actions]

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