feat(Link): add active prop to override default behaviour (#732)

Co-authored-by: Sébastien Chopin <seb@nuxt.com>

src/runtime/types/link.d.ts

@@ -1,6 +1,7 @@
 import type { NuxtLinkProps } from '#app'
 
 export interface Link extends NuxtLinkProps {
+  active?: boolean
   exact?: boolean
   exactQuery?: boolean
   exactMatch?: boolean