[Onboarding] Add decision tree for choosing country & language

[mirunaioana-msc]

Summary

In the onboarding process we need a decision tree that will help the user to access content adapted for their needs based on the country they are in and the language they understand.

Figma: https://www.figma.com/design/oaYXi603ZDkmhM0pz6unZQ/PTSD-Help?node-id=88-223&t=dLgvUI6WUmMSAalp-4

The decision tree will impact the content and the languages which will be managed from the Content Management System.