Track and display the current network configuration

[imobachgs]

Trello: https://trello.com/c/KYDDRo30/3630-8-display-the-running-network-configuration

This PR adds support for tracking the status of the network devices and displaying that information through the web UI.

Extending the networking model

Now the Device struct includes information about its current state, including its IP configuration, MAC address, device state, etc.

To keep this information up-to-date, we introduced the concept of network watchers which listens for events in the corresponding backend and update the network model accordingly. We implemented a NetworkManager Watcher.

+----------+  actions    +---------------+   actions   +---------------+
|  Watcher |---------->  | Network Model | <---------->| HTTP/JSON API |
+----------+             +---------------+    events   +---------------+
      |
      | listens
+----------------+
| NetworkManager +
+----------------+

Adapting the UI

When it comes to the web UI, we decided to make it work with the new updates mechanism, but nothing else. We plan to invest some time in rethinking that part of the UI (as we did for storge), but not now.

Screenshots

Overview with a single device

Overview with two devices

Network page including wired and wireless devices

Editing a wired connection

Editing a wireless connection

[coveralls]

coverage: 68.747% (-1.4%) from 70.139%
when pulling ae94b4e on network_running_config
into b43af77 on architecture_2024.

[imobachgs]

In general it looks good. However, we might need someone who was not involved to have a closer look.

[mvidner]

Still not finished
but I realized screenshots would be helpful to review the UI changes. Do you have some at hand?

[mvidner]

Went through the Rust part (JS is WIP)

[mvidner]

So what's left is

• fixing auth vs need_auth
• the translator comment: connections vs devices

(newDevices can stay)

Are we updating *.changes now too?

[imobachgs]

@teclator @mvidner We are not updating the changes file in the architecture_2024 branch. We will write a big entry when we merge. I have reverted the change.

[mvidner]

LGTM now, thanks!