add Quest hand tracking support and update docs

- Add hand tracking manifest entries to MosisSDK_UPL.xml
  - oculus.software.handtracking feature (required=false)
  - horizonos.permission.HAND_TRACKING permission
- Add OculusXR hand tracking settings to DefaultEngine.ini
- Update README with OBB deployment instructions and Quest config

Config/DefaultEngine.ini

@@ -98,3 +98,12 @@ ConnectionType=USBOnly
 bUseManualIPAddress=False
 ManualIPAddress=
 
+[/Script/OculusXRHMD.OculusXRHMDRuntimeSettings]
+bSupportHandTracking=True
+HandTrackingSupport=ControllersAndHands
+HandTrackingFrequency=High
+HandTrackingVersion=V2
+
+[/Script/OpenXRSettings.OpenXRSettings]
+bEnableHandTracking=True
+