Add direct link and pinned download command for native Stage2 v3

Add Bridge native Stage2 training source; GPU validation NOT_RUN

Add Chinese handoff instructions with pinned release and explicit Stage2 readiness

Add verified Bridge CTE30k and 3000-entry bank handoff; native training NOT READY

Add verified Bridge CTE30k and 3000-entry bank handoff; native training NOT READY

Add Zeva project videos

Add Zeva project videos

Add Zeva evolution video 2

Add Zeva evolution video 1

Add Zeva project demo video

Upload Zeva source and project assets

initial commit