Enlarge screenshot image for clarity

[Roopghuman]

What this PR does

This PR introduces a comprehensive image enlargement solution to address the user's request for better screenshot readability. It provides:

• A Python script (enlarge_image.py) for command-line image resizing with various resampling methods (Lanczos, Bicubic, Bilinear, Nearest).
• A user-friendly web interface (image_enlarger.html) for drag-and-drop image enlargement.
• A simple bash script (enlarge_screenshot.sh) for quick command-line usage with optimized settings for screenshots.
• Detailed documentation (README_IMAGE_ENLARGER.md) covering usage, options, and installation.

The solution is designed to enlarge images, particularly screenshots like the Russell Jewelers case study, while preserving quality for improved clarity and presentation.

Reviewer's guide to testing

1. Web Interface: Open image_enlarger.html in a browser. Drag and drop an image (e.g., a screenshot), adjust the scale and method, then click "Enlarge Image" and download the result. Verify the enlarged image's quality and dimensions.
2. Command Line (Python): Execute python3 enlarge_image.py <your_image.png> -s 2.5 -m lanczos. Check the generated output image for correct enlargement and quality.
3. Command Line (Bash): Run ./enlarge_screenshot.sh <your_image.png>. Verify the output image created with default optimal settings.
4. Review README_IMAGE_ENLARGER.md for clarity, completeness, and accuracy of instructions.

Things to focus on

1. enlarge_image.py: Ensure the image resizing logic and application of different resampling methods are correct.
2. image_enlarger.html: Verify the functionality of the web interface, including file upload, scale/method selection, image processing, and download.
3. enlarge_screenshot.sh: Confirm proper script execution and that the default settings (2.5x scale, Lanczos method) are applied correctly.
4. README_IMAGE_ENLARGER.md: Check for clear, concise, and accurate instructions, especially regarding recommended settings for screenshots.

Checklist

Before submitting the PR, please consider if any of the following are needed:

• Update CHANGELOG.md if the changes would impact users
• Update README.md, if appropriate.
• Update any relevant pages in /docs, if necessary
• For security fixes, the Disclosure Policy must be followed.

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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