Updates SwiftUI app to match the demo video

[Richard-Gist]

Linked Issue:

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• [x] Did you sign the Contributor License Agreement?
• [x] Is the linter reporting 0 errors?
• [x] Did you comply with our styleguide?
• [x] Is there adequate test coverage for your new code?
• [x] Does the CI pipeline pass?
• [x] Did you update the sample app?
• [x] Did you change the public API?

[Richard-Gist]

I'm in process of making the demo app testable but I have hit 1 main roadblock.

1) The modifiers we're putting on the PasswordWorkflow make it uncastable in ViewInspector thus failing.

For 1, I love the flexibility that it showcases with embedding things in a NavigationView, so I'm reluctant to change the prod code for testability.

[codecov-commenter]

Codecov Report

Merging #145 (1b4f8db) into main (e256818) will decrease coverage by 1.65%. The diff coverage is 86.72%.

@@            Coverage Diff             @@
##             main     #145      +/-   ##
==========================================
- Coverage   92.90%   91.25%   -1.66%     
==========================================
  Files          79       92      +13     
  Lines        1918     2356     +438     
==========================================
+ Hits         1782     2150     +368     
- Misses        136      206      +70     

Impacted Files	Coverage Δ
ExampleApps/SwiftUIExample/Views/ContentView.swift	92.30% <ø> (ø)
...Example/Views/QRScanner/QRScannerFeatureView.swift	90.90% <ø> (ø)
Sources/SwiftCurrent/Models/Workflow.swift	100.00% <ø> (ø)
...ces/SwiftCurrent/Protocols/FlowRepresentable.swift	85.00% <ø> (ø)
...t_UIKit/Extensions/UIViewControllerAdditions.swift	100.00% <ø> (ø)
...ps/SwiftUIExample/Views/Design/PrimaryButton.swift	44.44% <44.44%> (ø)
.../SwiftUIExample/Views/Design/SecondaryButton.swift	44.44% <44.44%> (ø)
...SwiftUIExample/Views/Design/PrimaryTextField.swift	66.66% <66.66%> (ø)
...SwiftUIExample/Views/Profile/ChangeEmailView.swift	73.33% <73.33%> (ø)
...s/SwiftUIExample/Views/GenericOnboardingView.swift	73.52% <73.52%> (ø)
... and 19 more

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[Richard-Gist]

So we had a little chat and I'm going to reorient my approach to our example apps.

From now on, our example apps will focus on a production-worthy app that uses SwiftCurrent to achieve its goals. The testing for these apps would reflect how we would do our own testing for a production app, moving away from testing specifically for SwiftCurrent. In addition, because these would be prod apps now, we'll want to move out the hosting application for library testing into a new target to keep test code out of prod.