v1.15.0-beta.1

Fixed

• fix: Catch not found card @juliusknorr #6646
• fix: Avoid failing on public dav URLs @juliusknorr #6642
• fix: Proper rich object formats @juliusknorr #6641
• fix(notifications): Notifier::prepare() threw \InvalidArgumentExcepti… @nickvergessen #6623
• fix: close modal after deleting card @ludij #6617
• fix: Use new query builder @juliusknorr #6611
• fix: new card input spacing @luka-nextcloud #6574