feat: add Vite 8 Support

[BALOTIAS]

Bumps the peer dependency to Vite 8 and fixes the things that broke along the way.

Breaking Changes

• Requires Vite 8+
• Requires Node.js 20.19.0+ or 22.12.0+

What changed

JSON src custom blocks now work with rolldown
Vite 8 swaps rollup for rolldown under the hood, which is stricter about parsing module content. Raw JSON returned from the load hook would blow up with a PARSE_ERROR. Fixed by wrapping JSON src content as export default <json> before it hits the bundler.

Replaced esno with tsx
esno chokes on Node.js v24 with a module cycle error. Swapped it out for tsx in the post-build script.

Upgraded unbuild (0.7.4 → 3.6.1) and added TypeScript 6
The old unbuild shipped its own TypeScript 4.x, which doesn't understand the "bundler" module resolution needed for Vite 8's package exports. Updated both.

tsconfig.json: moduleResolution: "node" → "bundler"
Vite 8 only exposes types via exports in its package.json. The old "node" resolution ignores exports, so TypeScript couldn't find Vite at all.

Vitest hookTimeout
The beforeAll hooks (spin up dev server + launch puppeteer) were hitting the default 10s limit. Bumped hookTimeout to match the existing testTimeout: 100000.

[BALOTIAS]

I've created a branch containing the dist files as well in case someone needs it: https://github.com/BALOTIAS/vite-plugin-vue2/tree/dist

npm install "https://github.com/BALOTIAS/vite-plugin-vue2#dist"