Does not handle Vite building

[jarimustonen]

Remix is in the process of being moving its build process to Vite. At the moment, this adapter does not seem to handle Vite build.

To Reproduce Steps to reproduce the behavior:

1. Port the project to use Vite using default instructions here: https://remix.run/docs/en/main/future/vite
2. Update netlify.toml, publish to build instead on public
3. Deploy site

At this point, Netlify reports that there are no functions deployed.

We, of course, expect the code to deploy normally.

[serhalp]

Closed by #251. Please feel free to re-open if this is still not working.