feat(cluster-link) add cluster link crud WD-23025

[edlerd]

Done

• Interaction for cluster link crud

Fixes WD-23025

Draft state as this is still pending design and relies on canonical/lxd#14884

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @Kxiru or @edlerd for access.
   • With a local copy of this branch, build and run as described in the docs.
2. Perform the following QA steps:
   • open the cluster link list
   • create a cluster link
   • delete a cluster link

Screenshots

Cluster links

[webteam-app]

Demo

Jenkins

demos.haus

[Kxiru]

Testing took place within a microcloud instance.
Some notes:

1. On my first time loading the cluster links list, I was met with this messaging. The notification is unfriendly (D:) and inconsistent with our usual pattern of just having an empty list page.

2. The empty list page also reloads periodically / when I go to another tab. Perhaps a reload usually happens in this case and this is normal, but the error notification is jarring.

3. A little nitpick, and may just be browser specific, but some left padding or margin may get rid of the cut-off radio highlighting:

4. I created a clusterlink without specifying a group to see what would happen, and I received this message, perhaps we can have better error messaging?:

5. Hmm... Cluster link creation did not seem to work for me. Do I need to configure my backend specially in any way? Again, bringing any error messaging to the surface may help diagnose.

[Kxiru]

I repeated the tests in my local / host (now clustered) backend and received the same results.

[edlerd]

Thanks for the review @Kxiru Sorry for the confusion here as the backend for this is not yet merged into LXD main branch.

Moving this back to draft as the backend PR got closed yesterday. So there is no backend to run this against, except for the closed PR state. I created this off a custom-built from that PR branch.

[edlerd]

Closing this for now as the backend is not yet merged and taken back into design.