Third-party applications via webhooks

*Work estimated to **start** in end 2024/early 2025*

Details in https://doi.org/10.5281/zenodo.10901185

Related to #189

### Screenshots from document:

![Image](https://github.com/inveniosoftware/product-rdm/assets/1698163/6f5e14f7-803b-4c33-9ec4-6d91913b89e8)

