feat: add ascending and descending sorting support to Bubble Sort CLI

[jyotish6699]

Description

This PR enhances the existing Bubble Sort CLI tool by adding support for both ascending and descending sorting orders.

Users can now choose their preferred sorting order before the sorting operation begins.

Changes Made

• Added ascending and descending sorting support

• Added user choice selection for sorting order

• Improved input validation for invalid sorting choices

• Added additional test cases for descending order sorting

• Added edge-case test coverage for:

  • Empty lists
  • Single-element lists
  • Negative numbers

• Preserved beginner-friendly CLI structure and procedural coding style

Example

Choose sorting order:
1. Ascending
2. Descending

Why This Change

Previously, the Bubble Sort tool only supported ascending order sorting.

This enhancement improves:

• flexibility
• usability
• beginner learning experience
• understanding of sorting behavior

Testing

Tested successfully with:

• Ascending sorting
• Descending sorting
• Empty input lists
• Single-element lists
• Negative numbers
• Invalid sorting choices

Issue Reference

Closes #552

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[github-actions]

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