Use VitePress instead of VuePress

[ElijahPepe]

VitePress offers faster build times compared to VuePress (because it runs Vite under the hood) and it depends on Vue 3. Only issue I can see with it is that it alienates some older browsers due to its ESM-focused architecture, although the @vitejs/plugin-legacy plugin fixes that.

Honorarily pinging @emiyl for input on switching from VuePress to VitePress.

[tiziodcaio]

Vuepress beta now is using vite instead of webpack

[ElijahPepe]

I wasn't aware VuePress beta is using Vite. I thought VuePress was in maintenance mode.