feat: Add script for batch image resizing

[mukkss]

Description and Changes made

This pull request adds a Python script for batch resizing images from the command line. It provides a simple and efficient way to process multiple images at once.

This contribution includes:

• A new script, resize_images.py, which takes an input folder, an output folder, and a target size as arguments.
• Support for multiple image formats, including JPG, PNG, and WebP.
• A new README.md file with detailed installation and usage instructions for the script.
• Use of Python's argparse library for a robust command-line interface.

Related Issue

Closes #26

Type of change

• New feature (non-breaking change which adds functionality)
• Documentation update

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary
• I have added documentation wherever appropriate

Additional Notes

This script depends on the Pillow library. The accompanying README.md includes the necessary pip install command for reviewers and users.

[devmalik7]

@mukkss Thank you for the contribution :-)