Add `player names <entity>` event (#2708)
* Added PlayerNameEntityScriptEvent
* persistence, meta, and no old_name changes
* `old_name` method changed
* `old_name` method changed
* removed redundant check in old_name context
* oldName restructuring
* persistent determination meta clarified
* persistent determination changed
* persistent meta
* fix
* aya update
* aya update
(
commit: eed4845)
