LifeCycle Policies - Squashed

[Arnei]

Originally #1004.

The old PR for lifecycle policies was old, had many commits and many merges. Creating a squashed commit seemed like the simplest option to bring lifecycle policies from the old history to the new history.

Instead of only being able to view lifecycle policies, this commit lets you edit them, create new ones and even delete them.

Depends on changes to the backend: opencast/opencast#6139. These changes are currently pointed at develop.

To test this, you'll need an Opencast with backend changes mentioned above.

Demonstration:
Bildschirmaufzeichnung vom 2024-12-04 10-45-28.webm

[github-actions]

Use docker or podman to test this pull request locally.

Run test server using develop.opencast.org as backend:

podman run --rm -it -p 127.0.0.1:3000:3000 ghcr.io/opencast/admin-interface:pr-1571

Specify a different backend like stable.opencast.org:

podman run --rm -it -p 127.0.0.1:3000:3000 -e PROXY_TARGET=https://stable.opencast.org ghcr.io/opencast/admin-interface:pr-1571

It may take a few seconds for the interface to spin up.
It will then be available at http://127.0.0.1:3000.
For more options you can pass on to the proxy, take a look at the README.md.