vanilla-extract/integration shouldn't depend on vite

[tony-scio]

vanilla-extract/integration has a dependency on vite, but not all users use the vite-plugin. Vite is a heavy weight dependency and has pretty regular dependabot security issues (most recently https://nvd.nist.gov/vuln/detail/CVE-2024-23331). So it's unfortunate for webpack users to have to both install it and force resolve to newer versions when it's not used.

In cases like these, it's usually most appropriate for optional dependencies to be marked peerDependencies instead of dependencies. Is it possible for vite to be a peer dependency of integration and a hard dependency of vite-plugin?

[taozhou-glean]

+1, looks like vite is marked as peer dependency even on vite-plugin: #1240