[Screen] Group Metadata

[nplasterer]

On an existing Group Chat we should be able to see and manage group chat metadata
https://www.figma.com/design/p6mt4tEDltI4mypD3TIgUk/Converse-App?node-id=5424-32891&t=qChbSMjpaik83X4w-0

Acceptance Criteria

• Can see the thumbnail, description, and group name
• Can update the thumbnail, description, and group name
• Can share a group invite link from the share menu
• Shows the first 6 members with the ability to click to see the full list
• Has a screen with the full list of members which loads performantly up to 400 members
• Can block the group
• When clicking on a member a modal appears with admin permissions
• When clicking on a member with no admin permissions it takes directly to the profile
• Can add a list of members

[covrter]

Because we don't yet support the "custom URL" for groups, we can leave today's gnarly URL out of the UI, and simply use it in the share sheet when summoned.