fix: clarify HTTP/2 handler type and sort imports

[KirtiGautam620]

Description

This PR resolves a lingering TypeScript issue in the HTTP server setup and improves code clarity.

Changes

Main Fix

• packages/vite/src/node/http.ts: Replace @ts-expect-error TODO comment with explicit type cast (as any) and add explanatory comment documenting why this is valid
  • The Connect middleware app works as an HTTP/1.1 handler
  • With allowHTTP1: true, the HTTP/2 server correctly handles both HTTP/1.1 and HTTP/2 requests
  • This pattern is intentional and correct

Additional

• Sort imports alphabetically in affected files for consistency with ESLint rules

Motivation

The original @ts-expect-error TODO: is this correct? comment indicated uncertainty about the type handling. This fix:

• Clarifies the intent of the code
• Documents the technical reasoning for maintainability
• Provides clarity for future developers reading the code

Testing

• Code passes pnpm run lint
• Code passes pnpm run format
• No runtime behavior changes

[KirtiGautam620]

hii @sapphi-red, This PR replaces the @ts-expect-error with an explicit, documented type cast and explains why the HTTP/1.1 handler works correctly in the HTTP/2 server. It also includes minor import sorting. Please review when convenient—thanks!

[sapphi-red]

https://github.com/vitejs/vite/pull/21135#issuecomment-3556411348