Add Commitlint, Commitizen, Standard Version, and Husky to SvelteKit Project

Hi Olivier Refalo, hope you find the content helpful!

The commit script part is directly copied from the commitizen GitHub repo

// package.json
{
  ...
  "script": {
    "commit": "cz"
  }
}

In my work project, I put this just to let my co-workers know they should use it instead of the general git commit.

I'd suggest just directly using npx cz or pnpm cz🙂.