[TASK] Admins set up first workspace in workspace module

It can be hard for an admin to remember a workspace
has to be set up on pid 0 to use workspaces.

The patch adds an info box with a button to create
a first workspace record to the workspace module.

Resolves: #65249
Releases: master, 10.4
Change-Id: I6909c199936f79477de8fb3b48cbbe37c50d6bcc
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65319


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>