feat(Shared): Migrate react page and dependencies

[kevinvangelder]

Replaces #842

[kevinvangelder]

I diverged the ReactPage file because of the differences in handling keyboard combos.

[rozele]

I wonder if a cleaner approach would be something like...

#if WINDOWS_UWP
var uiImplementation = _uiImplementationProvider.Create(
    reactContext,
    viewManagerList));
#else
var uiImplementation = _uiImplementationProvider.Create(
    reactContext,
    viewManagerList,
    Application.Current.MainWindow));
#endif 
uiManagerModule = new UIManagerModule(
    reactContext,
    viewManagerList,
    uiImplementation));

[rozele]

I know it's more code, but (personally) I think it's more readable and less likely to break / confuse someone if we have to add UIManagerModule parameters down the road (which I think is likely enough)

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In reply to: 85830373 [](ancestors = 85830373)

[rozele]

That's fine. At some point down the road we could try and come up with an abstraction that managed the subscribing and unsubscribing to the keyboard events and then just diverge that abstraction.

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In reply to: 257414578 [](ancestors = 257414578)

[matthargett]

LGTM based on all feedback here and in Reactiflux being implemented.