feat: add feedback to edit component form

[Sjoertjuh]

This adds the ability to add validation messages to the file field using custom actions, implemented in the same way as the default adminjs edit component https://github.com/SoftwareBrothers/adminjs/blob/262fa77163747f6dd340fbeffcbf46386801edf1/src/frontend/components/property-type/default-type/edit.tsx#L13-L25