Fix badly formatted ESM that was breaking Node 22 and 23

[JReinhold]

Closes #229
Closes sveltejs/cli#320
Closes sveltejs/cli#379
Closes storybookjs/storybook#30008

1. Fixed some imports that were missing .js file extensions
2. Changed tsconfig.json#moduleResolution to "nodenext" to enforce 👆 in the future, as per the Svelte docs
3. Removed usage of @storybook/node-logger, which was just a wrapper of console.log, but was causing problems in ESM.
4. Upgraded this repo to Node 22, to hopefully catch these issue in the future
5. Formatted with Prettier

Published as canary version 4.2.1--canary.31bd578.0

Todo

• Check if types are still working, especially exported components like Story, since it looks like the generated .d.ts-files are referencing Story.svelte.js files now, which doesn't really make sense.
• Investigate if hand-written .d.ts files should be converted to .ts-files.