[HollowEngine 1.21.1 | v2.3.0-rc1]

Add nameplate visibility and cutscene systems

Adds nameplate visibility control via NameplateComponent and RenderEntityNameplateEvent, allowing HIDDEN/SHOW/SHOW_ON_HOVER modes. Implements cutscene looping in CutscenePlaybackController. Refactors NpcActionController to support concurrent actions via startConcurrent() alongside the default single-action behavior. Adds player-facing cutscene scripting APIs (playCutscene, stopCutscene). Updates NPC creation to use setNameplate() utility and NameplateMode parameter. Version bump to 2.3.0-rc1.