Create the plans page in dark mode according to the [Figma](https://www.figma.com/design/ZoW3A9CHTfJfw8qh7iU41b/Optimal-Schedule-Builder?node-id=2925-836&p=f&t=jWcyHt2lCvIWaxsT-0) design Consult Dark Mode documentation for Tailwind [here](https://tailwindcss.com/docs/dark-mode) 
Create the plans page in dark mode according to the Figma design
Consult Dark Mode documentation for Tailwind here