Require orientation property on device object with proper binding

[mehsaandev]

Requirements:
My requirement is that the screen below has a chart and details below it. When I rotate my phone, it should only show me the chart on full screen in landscape mode.

Screen:

Suggested Solution:

• We can add orientation property in device object which has the value of the current orientation mode and that's either portrait or landscape.
• The use of the property will be like this: device.orientation. and on the basis of orientation value, we can make some conditional rendering to achieve the required view.
• Please make sure the bindings fire properly when orientation changes. The device info currently does not update after the initial load so we do need to enhance it.

[mehsaandev]

I've pushed my code in device_orientation branch.
here's the link to the file in which I've added orientation property:
https://github.com/EnsembleUI/ensemble/blob/1e2279106f46770b872468e0f2eb3cf3086f61ea/modules/ensemble/lib/framework/device.dart
Please test it and you may need to enhance the functionality in order to have proper live binding.