[!!!][TASK] Move TypoScript to Configuration folder

Resolves: #45541
Releases: 3.0
[!!!][TASK] Move flexforms to Configuration folder

Resolves: #45541
Releases: 3.0
[FEATURE] Add update script

Currently updates references to TypoScript files.

Resolves: #45541
Releases: 3.0
[TASK] Rename Doc folder to Documentation

Releases: 3.0