Update `SolidJS` examples

[rtritto]

Update solid-js examples:

• solid-hydration
• solid-vanilla

Details:

• Update dependencies and devDependencies
• Dependencies:
  • Added @fastify/vite, solid-js
  • Removed deprecated solid-app-router with @solidjs/router
  • Removed @fastify/static, fs-extra, klaw, middie because they are already included in @fastify/vite
  • Added vite-plugin-solid (removed from dev dependencies)
• Dev dependencies:
  • Added vitest
  • Added eslint-plugin-n peer dependencies of eslint-config-standard
  • Added @babel/core peer dependencies of @babel/eslint-parser
• Windows compatibility:
  • Replaced new URL(import.meta.url).pathname with process.cwd()
• solid-hydration example:
  • Replaced renderer with createRenderFunction in server.js (TypeError: config.createRenderFunction is not a function)

Open points:

• [ ] On both examples, there is a console warning in browser:

  • computations created outside a createRoot or render will never be disposed

[galvez]

This looks great — we should look into that warning though!