Add support for Vite 8

[darwinshameran]

What is the location of your example repository?

No response

Which package or tool is having this issue?

Hydrogen

What version of that package or tool are you using?

• Node.js: v22.22.0
• @shopify/hydrogen: 2026.1.1
• @shopify/mini-oxygen: 4.0.1
• @react-router/dev: 7.13.1
• vite: 8.0.0

What version of Remix are you using?

No response

Steps to Reproduce

1. Create a new Hydrogen project:
   npx shopify hydrogen init --template demo-store

2. Install Vite 8:
   npm install vite@8

3. Start the dev server:
   npm run dev

Expected Behavior

Dev server starts normally.

Actual Behavior

Server crashes immediately:

ReferenceError: vite_ssr_exportName is not defined
     at (server.ts:1)

Additional errors:

• Failed to resolve dependency: set-cookie-parser, present in ssr 'optimizeDeps.include'
• Failed to resolve dependency: cookie, present in ssr 'optimizeDeps.include'

Production build (shopify hydrogen build) completes but with warnings:

• esbuild option deprecated, should use oxc
• transformWithEsbuild deprecated, should use transformWithOxc
• Oxygen and Hydrogen plugins assign to bundle object, which Rolldown does not support