[winrt-uwp] Add RemoteSystems API (#39978)
[winrt-uwp] Add RemoteSystems API (#39978)

* Add Windows remoting APIs

* Add missing docs and replace template

* Mistyped event handler.

dsebastien/DefinitelyTyped,markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped