[Feature Request] Use or recommend NuxtIcon as default icon component

[kingyue737]

NuxtIcon is the official icon library of Nuxt. Since v1, <Icon> and <IconCSS> have been merged into one component, making integration more convenient. (Thus the instructions in the docs need a small fix).

Since v1.5 https://github.com/nuxt/icon/pull/243 NuxtIcon can include only used icons in the client bundle which does the same as UnoCSS Icon.

NuxtIcon supports Vuetify default icon naming like mdi-* .

Many users do not use UnoCSS with Vuetify since Vuetify has its own CSS utilities or they may prefer Tailwind. In my opinion, although I love Antfu Universe, replacing UnoCSS Icon with Nuxt Icon (which was also rewritten by antfu) makes the icon configuration of this module less opinionated.

Bonus: we can also maintain aliases for different icon sets