resursa iteme vizibile pe corp cu admin menu + disable idle cam

- rv-itemsonback v2.0: afișare props pe corp din inventar (medikit etc.)
- Admin menu /itemsonback cu ox_lib (search items, adjust pos/rot, select bone)
- Live preview cu auto-cleanup + /clearpreview emergency
- Config persistent JSON (data/items.json)
- Disable idle camera + idle animations (InvalidateIdleCam)
- resources.cfg: safety net ensure qs-weaponsonback
- fix(qs-inventory): Config.Genders[0]=Male pt QBCore compatibility

resources/[framework]/[addons]/rv-itemsonback/data/items.json

@@ -0,0 +1 @@
+[{"model":"prop_ld_health_pack","bone":11816,"rot":{"z":25.0,"y":-90.0,"x":5.0},"item":"medikit","pos":{"z":0.12,"y":-0.1,"x":0.0}}]