[CssBaseline] Consider rework

[oliviertassinari]

This issue is extracted from #30660 to have a space to discuss the improvements we can make to this component.

CssBaseline was introduced around 2019, today browsers are different, time to consider how to best evolve it.

Ideas:

1. https://moderncss.dev/modern-css-for-dynamic-component-based-architecture/
2. add html { overflow-y: scroll; } to avoid layout shift when changing pages or maybe https://twitter.com/stackblitz/status/1518924375721873408 but it doesn't seem to work with position absolute elements.
3. separate CSS resets and theme application [CssBaseline] Add colors with better constrast to <a> #38135 (comment)
4. make CssBasline enableColorScheme the default [website] Fix dark mode on brand pages #29611 (comment)
5. button margin should be reset? I shouldn't have to spend time to do this [docs] Fix Safari button misalignment #34861.
6. min-width: 0 everywhere: https://www.youtube.com/watch?v=cH8VbLM1958

Benchmark

• https://tailwindcss.com/docs/preflight
• https://twitter.com/souporserious/status/1746311121949356469
• https://www.youtube.com/watch?v=cCAtD_BAHNw