feat(reset): add tailwind-compat.css

[kirklin]

fix background color of some button styles in component libraries are lost when referencing the tailwind.css file.
Link: #2127

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[antfu]

That's something I have wanted for a while! Here are a few questions about it that we better address before having it:

• We should give a clear definition of how it works. Like "Based on Tailwind's preflight but without background color", or a list of the changes in the README. This will help users understand it, and also for future maintenance to know how to update (or keep sync with Tailwind).
• Maybe @unocss/reset/minimal.css? Since both uno- and reset are already present and does not provide more information.

[kirklin]

Do I need to rename uno-reset.css to minimal.css ?