Cannot import built-in themes for the dashboard.

[Pierstoval]

When creating the DashboardDefinition object, it is apparently impossible to import a theme.

The default theme is always used (it's Carbon for now), but importing Carbon manually doesn't work:

import { DashboardDefinition } from '@orbitale/svelte-admin';
import theme from '@orbitale/svelte-admin/themes/carbon';

export const dashboard = new DashboardDefinition({
    // ...
    adminConfig: {
        theme: theme,
    },
});

This might be related to package.json linking, but so far I couldn't fix it, and fall back using the default theme anyway.