Add demos link and other engines positions links

Author: darktears

README.md

@@ -47,8 +47,13 @@ enum DevicePostureType {
 }
 ```
 
+## Demos
+https://github.com/foldable-devices/demos
+
 ## Stakeholder Feedback
-No stakeholder feedback has been given at this time.
+Mozilla Position: https://github.com/mozilla/standards-positions/issues/882
+WebKit Position: https://github.com/WebKit/standards-positions/issues/328
+Chrome Status Entry: https://chromestatus.com/feature/5185813744975872
 
 ## References & Acknowledgements
 Many thanks for valuable feedback and advice from: