Move team setup name form into TeamManagement LiveView

[apata]

This PR moves the name field to team management component (as a conditional field), fixing the following issue:

Steps to reproduce

In team setup

• type invalid name, e.g. "My personal sites"
• name field error is shown

Expected

• user can't submit, needs to update name to be valid

Actual

• user can submit
• on submit, success flash is shown
• the chosen (invalid) name wasn't actually applied to team

The broader context is that once we introduce team name length limit, this scenario becomes a bit more common, so it needs to work properly.

Tests

• Automated tests have been added

Changelog

• Entry has been added to changelog

Documentation

• This change does not need a documentation update

Dark mode

• The UI has been tested both in dark and light mode