Our async tasks were already pretty world-independent (update checker as
well as some logging so this should work pretty well)
For the rest the ORMLite library should already be able to handle access from
different threads and whether economy plugins are compatible with Folia is
up to them, not us...
Also fix a bug where it was possible for shops to be created with shop owners that did not have a valid Account information when other plugins manipulated the name line after the NameChecker checked it. Now it gets checked twice, once at the start (to abort early and to populate the ownerAccount field) and once at the end to check again when the name line changed.