Add repeat to INativeKeyboardEvent

[chrisglein]

From Keyboarding in React Native Desktop document:

INativeKeyboardEvent is a new interface and will expose the following properties:

Property	Type	Description	Default
repeat	boolean	Flag to represent if a key is being held down/repeated	False

[github-actions]

This issue is stale because it has been open 365 days with no activity. Remove stale label or comment or this will be closed in 7 days.

[github-actions]

This issue was closed because it has been stalled for 7 days with no activity.