[branch: major-refactor] SSR error with SvelteKit's standard dev-mode

[vatro]

Branch: major-refactor
Project's current setup isn't properly configured for SvelteKit's standard SSR dev-mode.

Running dev in a fresh SvelteKit + svelthree app throws an error: <Scene> is not a valid SSR component. You may need to review your build config to ensure that dependencies are compiled, rather than imported as pre-compiled modules

See also: #47 (comment)

👉 However, if the app is built, everything's ok, no errors.

Fixing this probably involves changes to both svelthree and SvelteKit-App project setup / configuration.

TODO:
Tweak svelthree project setup (package.json, vite.config.js) as well as the SvelteKit-App configuration (svelte.config.js), so that the standard SvelteKit-App dev-mode (SSR) works.

[vatro]

see https://kit.svelte.dev/faq -> How do I fix the error I'm getting trying to include a package?

SSR in Vite is not yet stable. Libraries work best with Vite when they distribute both CJS and ESM in their package and you may wish to work with library authors to make this happen.

Sometimes issues can be worked around by fiddling with the optimizeDeps or ssr config values

[vatro]

The good thing is, I don't think this is a big issue, so no reason not to move on.
I've deployed a simple SvelteKit + svelthree test-app via Vercel and everything seem to be a-ok 🤷‍♂️:

Also, only 205kB transferred (compressed) is pretty neat! 😎

[vatro]

This issue seems to have been gone / is fixed with the new approach + newest SvelteKit, see 27c2d24