No more empty outputs from modeling API (#3931)

* WIP: No more empty outputs from modeling API

Part of https://github.com/KittyCAD/modeling-api/issues/518

* Remove unused import

* Keep Empty in the API

* Fix TS type error due to upgrade to ts_rs 10.0.0

* Fix warning about unused use

* Fix more type errors from ts_rs upgrade

* De-flake settings override desktop test

* Update export test file sizes

---------

Co-authored-by: Jonathan Tran <jonnytran@gmail.com>
Co-authored-by: Frank Noirot <frank@kittycad.io>

e2e/playwright/projects.spec.ts

@@ -203,7 +203,7 @@ test.describe('Can export from electron app', () => {
               },
               { timeout: 15_000 }
             )
-            .toBe(477481)
+            .toBe(482669)
 
           // clean up output.gltf
           await fsp.rm('output.gltf')