Feature Request: Add Dark Mode Support

As many users prefer browsing in dark mode to reduce eye strain, I would like to suggest implementing a dark mode feature for the openhwfoundation.org website. This enhancement could improve accessibility and user experience, especially for those who frequently visit the site in low-light environments.

Suggested Implementation

Provide a toggle switch (e.g., a button in the header) to switch between light and dark modes.
Use CSS variables to define color schemes for both light and dark modes, making it easier to maintain and update styles.
Ensure proper contrast ratios between text and background colors for optimum readability.

Additional Considerations

Consider remembering the user's preference using local storage or cookies.
Ensure that the theme change is applied seamlessly without page reloads.

This feature aligns with current web design trends and enhances the overall user experience. Looking forward to feedback and discussion on this suggestion!