The vendor was renamed from `wrm` to `werkraummedia`.
And the namespace vendor was renamed from `Wrm` to `WerkraumMedia`.
That way all references to PHP classes as well as the package name
itself need to be adjusted.
We migrated the part of the import to use DataHandler.
We didn't invest too much time as budgets are low.
Still the bugs are covered with tests and fixed.
Relates: #10782
