[FEATURE] Introduce file search in filelist module

Introduces a basic recursive file search. As a first
implementation only searching by file name is possible.

Releases: master
Resolves: #69119
Change-Id: Id8db1aa9bfd1ae145fcf8f2d5196e64fd262ebb1
Reviewed-on: http://review.typo3.org/42684


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Daniel Maier <dani-maier@gmx.de>
Tested-by: Daniel Maier <dani-maier@gmx.de>
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>