refactor: avoid e2e code to depend on application code

[hi-ogawa]

ytsub-v3/app/e2e/helper.ts

Line 10 in e0fa9d7

// TODO: avoid e2e code to depend on application code

The reason is that, since playwright runs its own typescript transpilation, it would block using certain vite specific features in application code (though this already happens with "tsx" used for local cli...).

[hi-ogawa]

Probably, what we have to do is to ensure Vite/Remix specific features are only used within app/routes files. Other "utilities" should be able to run at least on Vitest and Tsx anyways.

But, I still feels it's wrong for playwright test code to use much of internal details utilities to check e2e features...