adding dark mode toggle functionality

[Sakyasekhar]

Implemented Dark Mode Toggle with Context API and Custom Styling

• Dark Mode Context:
  Utilized useContext to pass the isDarkMode value to all components, ensuring consistent theme management across the app.

• Navbar Toggle:
  Added a toggle switch in Navbar.js to allow users to switch between dark and light modes seamlessly.

• Custom Styling:
  Created an App.css file that defines color schemes for both dark and light modes.
  Also added custom styling for the toggle button for smooth interaction and visual consistency.

[anthonyisensee]

Thanks for spending some time on this! Apologies if my "good first issue" tag was deceptive, it was meant for a friend. There is a much simpler solution that uses classes from the current CSS library. See https://github.com/anthonyisensee/event-tracker/commit/53c8e67cc0edbcce6c3f1592af11f6953062813d for my implementation.

As a newbie to React, I do appreciate the nod to the Context API! I will have to do some research about how best to use it.

[Sakyasekhar]

Thanks for spending some time on this! Apologies if my "good first issue" tag was deceptive, it was meant for a friend. There is a much simpler solution that uses classes from the current CSS library. See 53c8e67 for my implementation.

As a newbie to React, I do appreciate the nod to the Context API! I will have to do some research about how best to use it.

Thank you for letting me know simpler approach . This is my first PR and I appreciate feedback and tips for open source contributions