Apps for each of the adapters

The adapters don’t have tests, and it’s not totally clear what value they’d provide if they did, but I think we should have hello world apps for each of the officially supported adapters running on the respective platforms.

Should they live in this repo? In examples or a new directory? Or in the package directories themselves? Or should they have their own individual repos?

Most importantly, who feels like setting it up? 😀

[babichjacob]

* `pnpm init svelte@next tmp/my-test --<pre-selected options object>`

Currently this workflow will not work because the first step cannot be used in CI, at least as far as I can tell.

See https://github.com/sveltejs/kit/pull/1231 for an attempt to make the init process non-interactive that was rejected and why.

[Rich-Harris]

Going to close this as we’re currently deploying demo apps on each commit to platforms supported by the official adapters, and it’d be relatively straightforward for community adapters to do likewise via https://github.com/sveltejs/kit-template-default