Create usability testing prototype for simplified first-run wizard

[AmaLuci]

Following the recent redesign of the first-run wizard, a prototype should be created to validate the new flow with internal users who regularly install NethVoice.

Goal

Validate that the simplified wizard flow is clear and efficient for administrators who install NethVoice in real environments.

The objective is to ensure that:

• the reduced number of steps is understandable
• the Extensions step is clear and easy to complete
• the overall wizard allows admins to reach a working configuration quickly