Feature Request: Add Light and Dark Mode Theme Support

[ash1eygrace]

Many users have different preferences when it comes to the appearance of applications. Some find it easier on their eyes to work with a darker theme, while others prefer lighter themes. That said, let's implement a light and dark mode theme option within the application, allowing users to toggle between the two modes according to their preference. This feature should include:

1. A toggle button in navigation menu to switch between light and dark mode.
2. Consider, an option to automatically switch the theme based on the user's device settings, if available.
3. Proper contrast and color adjustments for both themes, ensuring that text and UI elements are easily readable and visually appealing.

Describe alternatives you've considered

An alternative solution would be to allow users to fully customize the application's color scheme, but this means it'll be more complicated to implement and maintain. Providing a light and dark mode option should be sufficient for most users' needs.