Add tauri e2e test for auth on Linux

[pierremtb]

From TODO at https://github.com/KittyCAD/modeling-app/blob/main/e2e/tauri/specs/signin.e2e.js#L9

We're able to programmatically click on the Sign In button now which opens the URL externally, now we have to find a way to catch that, authorize, and check that the apps moves to the user home page.

[pierremtb]

Need to find a way to use the token in secrets when the app queries https://api.kittycad.io/oauth2/device/verify?user_code=CODE-0000 in the external browser

[pierremtb]

Alright from reading api-deux tests and sending manual curls with the api token to https://api.kittycad.io/oauth2/device/verify and https://api.kittycad.io/oauth2/device/confirm I was able to get the e2e driven app authenticated! Now just have to automate this in e2e/tauri/specs/signin.e2e.js