fix: add user-agent

feat: add more contacts methods and adjust analytics

fix: analytics link

fix: render script removal

fix: new analytics

fix: german translation

fix: update language detection for landing page

feat: english landing page (#26)

feat: english landing page

feat: help center

fix: dark mode for onboarding screen

fix: onboarding screen safe area

feat: add apple preferred provider

feat: add solidchat badge count

feat: add preferred_auth_provider