[FEATURE] Merge extensions TS/Template

TypoScript workbench can be found within WEB > Template.

Technically "Template" was spread among several extensions.
Those extensions are now merged into one single extension.

Nothing is changed in menu/module/naming/interface.

Resolves: #49270
Releases: 6.2
Change-Id: I636d28034e363f4ed22871309a0643fec719d30e
Reviewed-on: https://review.typo3.org/21554
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn