Add a Glowing Button Effect

## Description
Create a **button with glowing hover effect** using CSS.

### Requirements
- Include hover animation or glowing border.
- Button should be responsive.
- Only HTML & CSS.
- Keep class names semantic.

### File/Folder
- components/glowing-button.html
- css/style.css

### Example/Screenshot
- Optional: Include screenshot or GIF in PR.
