Move terms to different vocabulary

Needs at least reroll. Also this would greatly benefit from tests. The validation doesn't seem to take into account that some vocabulary might be translatable and other not and moving translated term to non-translatable vocabulary probably causes errors.

I rebased the issue's merge request against the current 2.0.x branch and readded the changes from #27. A patch generated from the merge request applies cleanly against the latest release in my environment.

Patch also applied cleanly for me and moving terms within a taxonomy seems to be working well. However, when I tried enable the option to 'Keep old parents and add new ones' I get this error:

Error: Call to undefined method Drupal\taxonomy\Entity\Vocabulary::setHierarchy() in Drupal\taxonomy_manager\Form\MoveTermsForm->submitForm() (line 188 of /opt/drupal/web/modules/contrib/taxonomy_manager/src/Form/MoveTermsForm.php).

Linted the code and added a validation check to ensure only one vocabulary is selected.

I think it might also be necessary to add an access check before moving terms across vocabularies to confirm that the user has both delete term permissions in source and create term permissions in destination.

The latest commits apply cleanly and work on my end. Thank you @torfj!

The latest merge patch

https://git.drupalcode.org/project/taxonomy_manager/-/merge_requests/5.d...

works nicely for me. Thank's a lot! You made my day!

The only thing I noticed is that after moving the term from one vocabulary to another the automatic URL alias is not updated.

For example... if the old URL alias was /tag/old-vocabulary/term-name, after move I would expect the URL to be tag/new-vocabulary/term-name but it remains the same.

After I made all the term moves I needed the bulk regeneration of URL aliases did the job for me of course.

Maybe this is an intentional behavior of course. Just posting the note here in case that it is not. :)

Fix an error if you left the Vocabulary empty.