Improve documentation

[claustres]

• [x] Integrate tour component in each activity
• Create dedicated tours
  • [x] main menu
  • [x] catalog
  • [x] timeline
  • [x] navbar
  • [x] fab actions
  • [x] map activity
  • [x] globe activity
• Improve existing online help
  • [x] guides
  • [x] basic configuration
  • [x] iframe integration API