feat: Account linking applications

Created by: xkureck

• consolidator application
• linker application
• lib-linker library
• user profile implemented

How to test this: https://perunaai.atlassian.net/wiki/spaces/STRIBOG/pages/51314739/Implementa+n+detaily+a+testov+n+nov+ho+konsolid+toru#Testov%C3%A1n%C3%AD-frontend-aplikac%C3%AD(user-profile,-linker,-consolidator)-na-stroji-cloud4