Route Announcer for Vitepress 📢

[sanjaiyan-dev]

Adding Route Announcer to Vitepress js for better accessibility. Inspired by https://nextjs.org/docs/accessibility#route-announcements.

Extremely sorry still there are some work(adding to the Vitepress defaultly) to do please anyone help.me with it to integrate it.

[sanjaiyan-dev]

Code brief explanation -:

1. Used watchPostEffect because need to update the route announcer after DOM updates.

2. Used shallowRef for little improved performance.

Sorry if I made any mistakes ¡

[kiaking]

Seems like we have this via ngprogress 🙌 Thank you so much for the PR though 🚀