chore: Prepare the project to receive the UI

[ununhexium]

https://github.com/sovity/edc-ee/issues/728

### Checklist
- [ ] The PR title is short and expressive.
- [ ] I have updated the CHANGELOG.md. See [changelog_update.md](https://github.com/sovity/authority-portal/tree/main/docs/dev/changelog_updates.md) for more information.
- [ ] I have updated the Deployment Migration Notes Section in the CHANGELOG.md for any configuration / external API changes.
- [ ] I have updated the Community Edition [Postman-Collection](https://github.com/sovity/edc-extensions/blob/main/docs/api/postman_collection.json) if I changed existing APIs or added new APIs (e.g. for Management-API or API-Wrapper)
- [ ] I have performed a **self-review**

[ghost]

If still relevant by now plz feel free to reopen.