Create a nice looking frontend application for ForwardAuth

[dniel]

ForwardAuth should have a nice looking javascript frontend

• use forwardauth rest backend as api.
• dashboard view for status about events, s
  • display events from /events endpoint
  • display metrics from /metrics endpoint
• userinfo view for user
  • display the info from /userinfo endpoint
  • provide logout/session link
• session view
  • should display information from /session link
  • should display permissions and stuff
  • logout link