Docs: Clarify requirements of Next.js with Vite

[kylegach]

Docs follow-up to #28994

Greptile Summary

This PR adds a callout to clarify that using the Next.js framework with Vite requires Next.js 14.1.0 or later in the Storybook documentation.

• Added a callout in docs/get-started/frameworks/nextjs.mdx specifying Next.js 14.1.0+ requirement for Vite integration
• Provides important information for users considering or using the experimental Vite-based Next.js framework in Storybook
• Aligns documentation with recent updates to peer dependencies for the experimental Next.js-Vite framework

[greptile-apps]

LGTM

_{1 file(s) reviewed, no comment(s)
Edit PR Review Bot Settings}