NachoSoto 432b704dc7 Purchase Tester: added companion watchOS app (#2140) ...

I added this in order to debug #2132.

### Changes:
- Extracted `Core` framework to be used by both apps
- Added new `watchOS` target
- Changed `fastlane match` to also create profiles for this new target
- Added a simple view in the watch app that displays a text if an
entitlement is active, or a `restore` purchases button otherwise

This is just a starting point, we can add more to it in the future.

#### Note:
_Unfortunately I haven't been able to test this because of an Apple bug
(`FB11873951`):_


![incoming-722CC7FA-D970-4E23-AB88-50167248D98D](https://user-images.githubusercontent.com/685609/207672762-23abe3e7-6052-4b16-bdf2-7b1e502ffd81.PNG)

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..

AccentColor.colorset

Purchase Tester: added companion watchOS app (#2140)

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AppIcon.appiconset

Purchase Tester: added companion watchOS app (#2140)

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Contents.json

Purchase Tester: added companion watchOS app (#2140)

2022-12-21 07:31:58 -08:00