feat(xo-6): switch to language based on xo5 cookie

[S3bastianCZ]

Description

Switch to language based on xo5 cookie, If the language doesn't exist on X06, it fallback en english language

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

Review process

This 2-passes review process aims to:

• develop skills of junior reviewers
• limit the workload for senior reviewers
• limit the number of unnecessary changes by the author

1. The author creates a PR.
2. Review process:
   1. The author assigns the junior reviewer.
   2. The junior reviewer conducts their review:
      • Resolves their comments if they are addressed.
      • Adds comments if necessary or approves the PR.
   3. The junior reviewer assigns the senior reviewer.
   4. The senior reviewer conducts their review:
      • If there are no unresolved comments on the PR → merge.
      • Otherwise, we continue with 3.
3. The author responds to comments and/or makes corrections, and we go back to 2.

Notes:

1. The author can request a review at any time, even if the PR is still a Draft.
2. In theory, there should not be more than one reviewer at a time.
3. The author should not make any changes:
   • When a reviewer is assigned.
   • Between the junior and senior reviews.

[OlivierFL]

Remember to look at VueUse, there may be some helpers for this.

[S3bastianCZ]

Remember to look at VueUse, there may be some helpers for this.

There is indeed an integration to install for vueUse.
For now, we check the language in the cookie, do we really need vueUse for that?

[OlivierFL]

There is indeed an integration to install for vueUse. For now, we check the language in the cookie, do we really need vueUse for that?

Yes, the lib would provide more checks than a custom implementation, and would be useful we will handle the locales (and other things) on the settings page of XO 6.