[SELC-7247] feat: added hook useFocus to handle focus for accessibility in UserPage

[duffizipierluigi]

List of Changes

• add hook useFocus in UserPage from selfcare-common-frontend

Motivation and Context

Prevent focus from shifting to empty elements after user removal

Screenshots (if appropriate):

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.