[vuejs] Tabs of container-scope should have icons

[fdaugan]

There: http://localhost:5173/ligoj/index.html#/id/container-scope

In container-scope view, add icons to tabs "Groups" and "Entities"

[Terracosmos]

Resolved by #47 (merged into feature/vuejs). The Groups and Entities tabs now have prepend icons (mdi-account-group and mdi-domain), consistent with the type icons used elsewhere in the identity module.