[Fabric] Add support for native key event handling

[acoates-ms]

Description

No current infra for handling keyboard events on the native side.

Type of Change

• New feature (non-breaking change which adds functionality)

Why

• Parity
• Some native components, such as scrollview will require native keyboard handling.
• Adds ability for 3rd party components to provide custom native keyboard behavior
• Makes Switch focusable by default
• Implements keyboard handling for Space to toggle switch.

What

Adds props parsing for the keyUpEvents and keyDownEvents properties.
Adds a bubbling of key events on the native component tree.
Adds suppression of the key event bubbling in the case of a bubbling key*Events property specifying that it should be suppressed.
Add a method on the native ComponentView's which can be implemented by say ScrollViewer to handle key events natively (Will be useful for #12076)

Microsoft Reviewers: Open in CodeFlow

[Saadnajmi]

I think the answer is no, but is there any of this PR that happens in common cpp I could at least copy / use as a reference for RN-macOS? I.E: the HandledKeyEvent type, etc?

[acoates-ms]

The "common" code is in https://github.com/microsoft/react-native-windows/blob/main/vnext/Microsoft.ReactNative/Fabric/platform/react/renderer/components/view/HostPlatformViewProps.cpp

-- Thats the place on the native side we should align on.