[FEATURE] Code for TCA interface

Add sample code for demonstrating TCA[interface] and its
various properties.

Resolves: #55005
Releases: 0.6
Change-Id: I363aff5c8a8393254d09eded85cad1a8e35173f6
Reviewed-on: https://review.typo3.org/26826
Reviewed-by: Francois Suter
Tested-by: Francois Suter