feat(lite/header): add a link to XOA when detected on the pool

[pdonias]

Screenshots

Description

When XOA is connected to a pool, it adds information about itself on the pool's other_config. We can use that in XO Lite to find the XOA's IP address and add a link to open Xen Orchestra.

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