feat(xo-web/menu): add warning icon in proxies menu

[OlivierFL]

See Zammad#19126

Description

Add a warning icon in Proxies menu if unable to check proxy upgrade

Screenshot

Checklist

• Commit
  • Title follows commit conventions
  • Reference the relevant issue (Fixes #007, See xoa-support#42, See https://...)
  • If bug fix, add Introduced by
• Changelog
  • If visible by XOA users, add changelog entry
  • Update "Packages to release" in CHANGELOG.unreleased.md
• PR
  • If UI changes, add screenshots
  • If not finished or not tested, open as Draft

[MathieuRA]

Actually this code will not work in all error cases. If the proxy is unreachable, we won't be able to determine its state.
For that you have to add some code in the subscribeProxiesApplianceUpdaterState subscription, or directly to the getProxyApplianceUpdaterState method in src/common/xo/index.js.

// src/common/xo/index.js#subscribeProxiesApplianceUpdaterState

...
if (proxiesApplianceUpdaterState[proxyId] === undefined) {
    proxiesApplianceUpdaterState[proxyId] = createSubscription(async () => {
      try {
        return await getProxyApplianceUpdaterState(proxyId)
      } catch (error) {
        console.error(error)
        return { state: 'error' }
      }
    })
  }
...

Or

export const getProxyApplianceUpdaterState = async (id) => {
    try {
        return await _call('proxy.getApplianceUpdaterState', { id })
    } catch (error) {
        console.error(error)
        return { state: 'error' }
    }
}