vinext 1.1.0: Next.js parity fixes and stale-while-revalidate cache

vinext 1.1.0, the Vite plugin reimplementing the Next.js API, brings many behaviors in line with Next.js, especially for the App Router (redirect handling, metadata, special errors) and cache management. This release introduces stale-while-revalidate for use cache, serving stale entries while regenerating them in the background, and fixes several cache and server-side rendering inconsistencies. A milestone for those seeking a deploy-anywhere alternative to Next.js.