Admin setup, site configuration, user preferences

[gennitdev]

• in-app and external documentation for how to install and set up gennit
• have vertical steps to set up gennit for the first time https://www.naiveui.com/en-US/os-theme/components/steps
• when server starts, it gives admin forms to set up the server:
  • set up auth
  • set up google maps integration
  • set up public graphql endpoint
  • set up seed data or start empty
  • can set up backup and restore
  • can change default map center for event search page in settings
  • admin can set default tags
  • admin can set default channels
  • admin can use ssr mode or single page app mode
  • admin can set featured tags, channel flairs
  • can select time zone
  • can customize date format in site settings
  • can set the language of the server
  • can configure preference for distance unit, can set personal preference or default for whole site
• add a ui for adding a language and/or changing the english text
• ability to export data, create new server from old one
• ability to export all data for one user, transfer to different server
• can set prohibited channel names, usernames and tags
• can make server so that you have to request to join