feat!: add SvelteKit 2 support

[userquin]

Navigation seems to be broken when changing the url, for example (even with export const trailingSlash = 'never'; in layout):

• navigate to /about/ using the link header (the link is to /about)
• remove the trailing slash and press enter, kit should redirect to /about/

Previous test with disable: true in PWA configuration.

Maybe we need a breaking change and update the logic, we should include trailing and no trailing variant per route (html page).

I'll try to run the migration...

[userquin]

SvelteKit 2.0.1 fixes trailing slash: added Playwright offline + trailing slash test