Better room creation on-boarding with settings presets for most common use cases

[trosel]

As a user, I don't want to fiddle with granular settings to create rooms for common reasons.

• Create a json config file that assigns a name to a group of preset settings for a room
  • Determine most common room use cases for the initial config options. Eg:
    • Public Forum (not encrypted, history always visible, clear hierarchy of mods/admins)
    • Private Party (encrypted, history visible after someone joins, maybe just one admin)
    • Friend Hangout (encrypted, history always visible, democratic)
    • Broadcast Channel (not encrypted, nobody can post except for admins)
• Create Metadata tags on rooms that allow for UI sorting of rooms based on presets (similar to 1-to-1 rooms are separate from groups today)
• Create an onboarding UI flow for room creation
  1. Prompt the user to name the room
  2. Load preset settings options from the config file and let the users either choose one of the options or go fully manual
  3. Prompt the user to invite people to the room now (invite in UI or show them a URL link to the room), or do it later

[trosel]

Related element-hq/element-web#7684 element-hq/element-web#9254

[trosel]

See example templates in my comment here element-hq/element-web#2349 (comment)