create skeleton for overall structure

[MalikaIhle]

Previous overall structure:

• Home
• About
• Membership
• Staff Onboarding
• GitHub Organization
• LRZ GitLab
• Authoring Tutorials

should now be something like:

Home

• About
• Staff Onboarding
  • Internal communication
  • Working environments
  • Administration
• GitHub Organization
• Updating Website
  • create a news item
  • create an event page
  • create a profile page
  • edit other pages
• Onboarding Members
• Organizing Events
• Doing Public Outreach
  • Social Media
  • Newsletter
  • Flyers and posters
  • T-Shirts
• Authoring Tutorials
• Switching Groups
• GitLab Organisation
  • Website Deployment
  • Credentials
• Server installations

@NeuroShepherd or @Riyaaa1 or @Gnotic : would one of you be able to create that skeleton for the manual so that @bethwater1 can work in August on her sections and create further subsections following these examples ?

[NeuroShepherd]

I'll pick this up next week.