fix: avoid serverside fetch errors

[stefanprobst]

this catches any errors from network requests while pre-rendering serverside (which would redirect to error page with 500 status code), and delegates error handling to the client, i.e. vue-query's global error handler, which will show a toast notification.

x-ref #103

[ttechnicus]

merged into https://github.com/acdh-oeaw/vicav-vue3/tree/102-create-fallback-page-when-api-is-offline