Add Disk Usage Visualizer Script #492

Is your feature request related to a problem? Please describe.
Currently, there is no easy way in this repository to analyze disk usage for a directory. Users often struggle to identify which files or folders are taking up the most space, especially when working with large directories. This can lead to inefficient storage management and wasted time manually checking file sizes.

Describe the solution you'd like
Add a Python script called disk_usage_visualizer.py that:

• Recursively scans a given directory.
• Calculates the size of each file and folder.
• Displays the Top N largest files in a readable format.
• Accepts CLI arguments for path, number of files to display, and chart visualization.

Describe alternatives you've considered

• Manual file size checks using the OS file explorer or command-line tools (e.g., du on Linux).
• Existing scripts in the repo, which do not cover directory-wide disk usage visualization with sorting and charts.

Additional context
None