Beta release with Svelte 5 runes

[itsezc]

Refactor the existing Svelte component with Svelte runes, ready for the Svelte 5 release

[baseplate-admin]

Hi @metonym,

could we please have this feature?

Svelte 5 is in preview and enabling runes in project causes it to crash.

[stabldev]

https://github.com/baseplate-admin/coreproject-v4-ui/blob/master/src/lib/components/intersection_observer.svelte
this might help...