[FEATURE] Create new filemount from folder

When setting up permissions and a good folder structure,
admins should be able to create new sys_filemounts from
the context menu of a folder, so they do not have to use
the list module (or the be_groups wizard) but can conventiently
use the file list module OR the file tree.

Resolves: #94374
Releases: master
Change-Id: Idb9781136eb24cb266eb61cd9f3138ab9b91650e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/69516


Tested-by: core-ci <typo3@b13.com>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>