API design for power state, activation, and instancing (#577)

* Create .gitkeep

* Create .gitkeep

* Create .gitkeep

* Create .gitkeep

* Added AppLifecycle State/Power Notifications API spec. (#278)

* Add files via upload

Added AppLifecycle State/Power Notifications API spec.

* Update AppLifecycle StateNotifications.md

* Update AppLifecycle StateNotifications.md

* Added AppLifecycle Activation API spec. (#279)

* Add files via upload

* Update AppLifecycle Activation.md

* Update AppLifecycle Activation.md

* Update AppLifecycle Activation.md (#401)

* Update AppLifecycle Activation.md

* Added AppLifecycle Single/Multi-instancing API spec. (#280)

* Add files via upload

* Update AppLifecycle SingleMulti-Instancing.md

* Update AppLifecycle SingleMulti-Instancing.md

Removed toast sample snippet.

* Update AppLifecycle Activation.md (#434)

* Update AppLifecycle Activation.md

Added the exePath parameter to Register/Unregister methods.

* Update AppLifecycle Activation.md

Fixed the array declarations.

* Update AppLifecycle Activation.md

Changed RegisterForStartupActivation isEnabled to isDisabled.

* Update AppLifecycle Activation.md

Updated Startup registration to remove displayName, and add taskId to unregister.

* Update AppLifecycle Activation.md

Fixed array declarations again.

* Update AppLifecycle Activation.md

Removed isEnabled from StartupTask registration, as it makes no sense.

* Update AppLifecycle Activation.md

Fixed typo.

* Update AppLifecycle Activation.md

Dropped all the function overloads, added DisplayName to File & Protocol, added Logo to Protocol.

* Update AppLifecycle SingleMulti-Instancing.md

Removed toast sample snippet.

* Update AppLifecycle Activation.md

Renamed to AppInstance, and updated ExtendedActivationKind.

* Update AppLifecycle SingleMulti-Instancing.md

Renamed AppLifecycle to AppInstance, updated instancing APIs.

* Update AppLifecycle Activation.md

* Update AppLifecycle Activation.md

Made GetActivatedEventArgs an instance method instead of static.

* Update AppLifecycle SingleMulti-Instancing.md

Made GetActivatedEventArgs an instance method not static.

* Update AppLifecycle Activation.md

Added ProcessId.

* Update AppLifecycle SingleMulti-Instancing.md

Added ProcessId.

* Update AppLifecycle Activation.md

Added ProcessId example.

* Tidy up app activation

* Tidy up instancing

* Tidy up power state

* Update AppLifecycle Activation.md

Resolved a number of review comments.

* Update AppLifecycle SingleMulti-Instancing.md

Fixed most review comments.

* Update AppLifecycle SingleMulti-Instancing.md

Additional review fixes.

* Update AppLifecycle Activation.md

* Update AppLifecycle Activation.md

* Update AppLifecycle SingleMulti-Instancing.md

* Update AppLifecycle StateNotifications.md

Updated per review comments.

Co-authored-by: Jon Wiswall <[email protected]>

Author: andreww-msft

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specs/AppLifecycle/Activation/.gitkeep

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specs/AppLifecycle/Activation/AppLifecycle Activation.md

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specs/AppLifecycle/Instancing/.gitkeep

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