explicitly document setting options of vite-plugin-svelte via svelte.config.js

[inspiredlabs]

Describe the problem

It wasn't obvious that svelte.config.js has experimental features:

const config = {
  //experimental: { inspector: true },
  ...
}

Describe the proposed solution

The documentation is clearly a moving target at this stage – but it might be worth adding this, explicit example to svelte.config.js, commented out as:

const config = {
  //experimental: { inspector: true },
  ...
}

A minimal hint such as this would encourage debugging without additional configuration, consulting the documentation or extraneous changes to config.md when the API drops the experimental flag.

Alternatives considered

Make the distinction clearer in config.md, as the alternative configuration seems confusing.

Importance

nice to have

[bluwy]

Do you mean adding experimental: {} under this section's second code example too? I think that would be fine to add.

[dominikg]

Updated title and importance.

Please don't file minor documentation improvements with high importance.