### Motivation
Template 5 but with multiple tiers 😊
### Description
Enabling Template 7 by changing `7_disabled` to `7`
- Changed a `header.jpg` to `header.heic` to try and fix issue with
weirdly failing snapshot UI test
- Changed visibility on `TestData` from `public` to `internal`
- Hides tier selector if only one tier
- Changed `color_overrides_by_tier` to `colors_by_tier` and
`image_overrides_by_tier` to `images_by_tier`
- The original implementation was going to default to existing color and
images configurations and then override by tier
- However, this turned out to be harder to implement on the
configuration side
- `Colors` got four new optional values
- `tier_control_background`
- `tier_control_foreground`
- `tier_control_selected_background`
- `tier_control_selected_foreground`
### Demo
#### Full Screen
https://github.com/RevenueCat/purchases-ios/assets/401294/e5317a53-428c-415e-a1a1-b4231d32a776
### Footer
https://github.com/RevenueCat/purchases-ios/assets/401294/8905b55e-0fa2-49f0-aa1c-d4c1e694fb5b
### Footer Condensed
https://github.com/RevenueCat/purchases-ios/assets/401294/311d78fb-bdeb-43cd-b601-9c60a8a54b6f
Follow up to #3599 and #3600.
These `@MainActor` annotations don't work anymore because of this:
> Main actor-isolated class '...' has different actor isolation from
nonisolated superclass 'TestCase'; this is an error in Swift 6
They were necessary with an older version of Xcode (likely 13.x), but
not anymore.
---------
Co-authored-by: Mark Villacampa <m@markvillacampa.com>
The `submodule` approach had 2 issues:
- Inconsistent results if users don't have a valid SSH key (#3124)
- `SPM` actually clones the submodule, which users don't need
This new approach only fetches the snapshots through a new `fastlane
fetch_snapshots` lane.
- Added `RevenueCatUI` to `Package.json`
- Set up tests for `RevenueCatUI` using `snapshot-testing` (not in CI
during initial development)
- Added Schemes to allow easily building packages while working on the
`Package.swift`
- Updated `SimpleApp` to use new package
Fixes#2998. See #2989 for why this is needed in the first place.
This is now fixed in SPM:
https://github.com/apple/swift-package-manager/pull/6794, but we need a
workaround for now.
Since `.custom` doesn't work properly (it gets evaluated in Xcode even
outside of that platform), this splits `Package.swift` based on Xcode
version.
Thanks @neonichu for helping with this.
