[iOS] ECommerce Capabilities

[moiz994]

Epic Description:
This epic aims to enhance the user experience of the new edX mobile app by introducing in-app payment functionality, allowing users to seamlessly upgrade their course access and access additional content through convenient in-app purchases.

Current Implementation on legacy Apps Video Demos: https://drive.google.com/drive/folders/1XZ7BWzlN6QjWvrmNbKCxBIfgzFMznaO8?usp=drive_link

Tasks

Beta Give feedback

1. [iOS] Upgrade button and messaging on Locked Content #400
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2. [iOS] Upgrade button and messaging on Course Access Expired Screen #401
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3. [iOS] Upgrade banner under course cards on the My Course screen #402
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4. [iOS] Upgrade course value prop modal implementation #403
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5. [iOS] Restore purchases through profile screen #404
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6. [iOS] Full screen loader whille course is upgarding #405
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7. [iOS] Upgrade button on Course Home #406
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8. [iOS] Payments and upgrade execution #407
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9. [iOS] Payment error handling #408
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10. [iOS] Unfulfilled payments case handling #409
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11. [iOS] Analytics implementation #410
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