implemented Counting sort

[PresenceOP-Coder]

Description

Implements Counting Sort visualization in the Algorithm Visualizer.
The feature visually demonstrates the counting, cumulative, and placement phases of Counting Sort with step-by-step animations and labeled arrays.
Users can input a custom array, watch the counting process, and see how the sorted output is generated in real time.

Semver Changes

• Patch (bug fix, no new features)
• Minor (new features, no breaking changes)
• Major (breaking changes)

Issues

Closes #94

Checklist

• I have read the Contributing Guidelines.

[PerHac13]

has been reevaluated