Provide a property "target" for setting the redirect action for featu…

[szchixy]

Resolves #2896.

This allows you to redirect new a tab page when clicking on a feature item.

Examples:

Set target: _blank for "Guide" feature item, and set nothing for "Reference" item. When click on "Guide" feature item, it will open a new tab page and redirect to it, while reflash in self page when click on "Reference" page.

---
layout: home

title: VitePress
titleTemplate: Vite & Vue Powered Static Site Generator

hero:
  name: VitePress
  text: Vite & Vue Powered Static Site Generator
  tagline: Simple, powerful, and fast. Meet the modern SSG framework you've always wanted.
  actions:
    - theme: brand
      text: Get Started
      link: /guide/getting-started
    - theme: alt
      text: View on GitHub
      link: https://github.com/vuejs/vitepress
  image:
    src: /vitepress-logo-large.webp
    alt: VitePress

features:
  - title: Guide
    link: /guide/what-is-vitepress
    target: _blank
  - title: Reference
    link: /Reference/site-config
---