Fix threlte bundling configuration

[franknoirot]

After my last PR, the Vercel deploy started having crashing issues, where on page load server-side the following error would occur:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/var/task/node_modules/three/examples/jsm/loaders/DRACOLoader' imported from /var/task/.svelte-kit/output/server/chunks/ModelPreviewer.js
    at new NodeError (node:internal/errors:405:5)
    at finalizeResolution (node:internal/modules/esm/resolve:329:11)
    at moduleResolve (node:internal/modules/esm/resolve:992:10)
    at moduleResolveWithNodePath (node:internal/modules/esm/resolve:936:12)
    at defaultResolve (node:internal/modules/esm/resolve:1178:79)
    at nextResolve (node:internal/modules/esm/loader:163:28)
    at ESMLoader.resolve (node:internal/modules/esm/loader:835:30)
    at ESMLoader.getModuleJob (node:internal/modules/esm/loader:424:18)
    at ModuleWrap.<anonymous> (node:internal/modules/esm/module_job:77:40)
    at link (node:internal/modules/esm/module_job:76:36) {
  code: 'ERR_MODULE_NOT_FOUND'
}

This appears to be because something in the <GLTF /> component from our 3D component library threlte is importing from THREE under the hood but Svelte isn't able to pick up on that for bundling the SSR code. I'm trying to explicitly import it in the hopes that works.

[vercel]

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Name	Status	Preview	Updated (UTC)
text-to-cad-ui	✅ Ready (Inspect)	Visit Preview	Oct 19, 2023 7:42am

[franknoirot]

That did not work.