Global administration to use updated tables

[SimoneZaza]

Description

As an Alkemio team member, I want the global administration pages to be richer and consistent with the rest of the platform. Currently, the Spaces page is only loading the first 100 (or 50?) Spaces, even if I click load more. These pages are in dying need of an update

Acceptance criteria

Spaces

• [ ] Add button
• [ ] Search field
• [ ] Filter on ??
• [ ] New table with columns:
• Name
• Host
• Amount of Subspaces
• Edit icon
• Delete icon
• [ ] …

Users

• [ ] Invite button opening #6482
• [ ] Search field
• [ ] Filter on ??
• [ ] New table with columns:
• This issue is not done yet, sorry, no more time, will finish this later - Simone

Additional Context

Screen shots / UX designs / data that are relevant.