Add:ColorChanger-MiniApp/segawa74(#1115)

[segawa74]

Developer Checklist

• Followed guidelines mentioned in the readme file.
• Followed directory structure. (e.g. ProjectName/{USERNAME}/...yourfiles)
• Starred ⭐ the Repo (Optional)

Summary

I've created a Color Changer Mini-App that allows users to customize webpage elements with different colors and opacity levels. The app features:

• Individual color control for multiple elements (box background, headings, text, and different button types)
• Per-element opacity settings
• Real-time color preview
• Color palette with preset colors
• Color saving functionality for reuse
• Responsive design

The implementation uses HTML, CSS, and JavaScript with jQuery, focusing on creating an intuitive and user-friendly interface. The app meets all the requirements specified in issue #1115 and includes additional features like individual opacity settings for each element.

Screenshot