L4: Move all styling to Tailwind CSS

[bewildergeist]

Refactoring time! We're moving to Tailwind CSS for all our styling needs. So do the following:

• Install and set up Tailwind as described in the Remix docs.
• Install the official Tailwind extension for VS Code and be sure to configure the editor.quickSuggestions setting as described in the extension's README.
• Methodically go through all components and replace the route-related stylesheets with Tailwind classes added directly inside your JSX files. If you find yourself repeating the same styling several places, consider extracting a new component.
• Aim to replicate the existing styling from L4: Use Remix route styles for styling #2 as closely as possible.
• When you are done, you should only be importing a tailwind.css file and have no other CSS files in your solution.
• Answer this little questionnaire when you are done (or before you run out of time)

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If you finish early:

• Ensure that you have implemented all the styling shown in L4: Use Remix route styles for styling #2
• If so, by all means start fine-tuning the styling and improving the UX