change style/ add darkMode

[amradelata]

Hi amin2312

Changes Made:

• Updated the style of the library to create a more modern and visually appealing design.
• Added support for dark mode by implementing a button.
• Modified the CSS styles to ensure proper rendering in both light and dark modes.

Reason for Changes:

• To improve the overall user experience and make the application more visually appealing.
• To provide users with the option to switch to a dark mode, which can reduce eye strain in low-light environments.

Additional Notes:

• Ensured compatibility with different browsers and devices.
• Thoroughly tested the changes to ensure they work as expected.

Commit Hash: 041ae54935a6955bfb488eb02895fc140801853f