Add a copy button to the pg-color basic example

[BittuBarnwal7479]

Description

The basic pg-color example displays the selected color value but doesn't provide a convenient way to copy it.

Proposed solution

Add a Copy button next to the selected color.

The button should:

• remain disabled until a color is selected
• copy the selected HEX color to the clipboard
• provide visual feedback after copying

This would improve the usability of the example for developers who frequently need to reuse selected color values.

20260624-2357-09.4584045.mp4