Expose resolved server URLs for metaframeworks

[bluwy]

Update: Implemented in #8986

Proposal

Expose the resolved server URLs from the Vite dev and preview server, e.g.

viteServer.resolvedUrls = {
  local: ['http://localhost:5173'],
  network: []
}

Background

When starting the Vite dev server with vite, we get:

  VITE v3.0.0-beta.5  ready in 322 ms

  ➜  Local:   http://127.0.0.1:5173/
  ➜  Network: use --host to expose

Metaframeworks that uses createServer can opt to not print Vite's default message by not calling server.printUrls. However, this means that the metaframeworks have to resolve the URLs themselves, potentially different from Vite's actual URLs.

This issue can be seen in SvelteKit, Astro, vite-plugin-qrcode

Alternative

Expose some sort of vanity api for metaframeworks, so they can print their own message during server restart ootb, and custom logging message etc. Might be a bit far-fetched for now.