update next.js integration tests

[leoortizz]

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[gemini-code-assist]

Summary of Changes

Hello @leoortizz, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on updating the Next.js integration test suite to ensure its compatibility and accuracy with the latest versions of Next.js. The changes involve upgrading core Next.js dependencies, adjusting TypeScript compilation settings to leverage modern JSX transforms, and modifying the test assertions to correctly identify the file outputs and structures generated by the updated Next.js framework.

Highlights

• Dependency Updates: Updated Next.js from version 15.4.8 to 16.0.8, along with corresponding updates to @types/react, @types/react-dom, and eslint-config-next.
• TypeScript Configuration: Modified the tsconfig.json to change the jsx compiler option from "preserve" to "react-jsx" and added a new path for development types (.next/dev/types/**/*.ts).
• Integration Test Adjustments: Refined the expected file paths and patterns within the Next.js integration tests to align with the output structure of Next.js 16.x, including new manifest files and more generic regex patterns for static chunks.

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Code Review

This pull request primarily updates the Next.js framework and its associated dependencies in the nextjs webframeworks deploy test project. Specifically, it upgrades next from 15.4.8 to 16.0.8, and updates @types/react, @types/react-dom, and eslint-config-next to align with the new Next.js version. The tsconfig.json file is modified to change the jsx compiler option from "preserve" to "react-jsx" and to include .next/dev/types/**/*.ts for development type declarations. The tests.ts file is updated to reflect changes in Next.js's output structure, including new paths for localized SSG data, the addition of _clientMiddlewareManifest.json and _not-found.html, and a significant overhaul of expected file patterns for static chunks, moving from specific names to more generic turbopack-[^.]+.js, [a-f0-9]+.js, and [a-f0-9]+.css patterns.