Replaces WorkflowLauncher and thenProceed(with:) with a new WorkflowView API, as discussed in #61

[Tyler-Keith-Thompson]

Linked Issue: Closes #156

Checklist:

• Did you sign the Contributor License Agreement?
• Is the linter reporting 0 errors?
• Did you comply with our styleguide?
• Is there adequate test coverage for your new code?
• Does the CI pipeline pass?
• Did you update the documentation?
• Did you update the sample app?
• Do we need to increment the minor/major version?
• Did you change the public API?
• Have you done everything you can to make sure that errors that can occur are compile-time errors, and if they have to be runtime do you have adequate tests and documentation around those runtime errors? For more details.

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If Applicable:

• Did you test when the first item is skipped?
• Did you test when the last item is skipped?
• Did you test when middle items are skipped?
• Did you test when incorrect data is passed forward?
• Did you test proceeding backwards?

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If Public API Has Changed:

• Did you deprecate (rather than remove) any old methods/variables/etc? Our philosophy for deprecation.
• Have you done the best that you can to make sure that the compiler guides people to changing to the new API? (Example: the renamed attribute)
• If necessary, have you tested the upgrade path for at least N-1 versions? For example, if data persists between v1 and v2 then that upgrade should be tested and as easy as we can make it.

[codecov-commenter]

Codecov Report

Merging #179 (94f06fe) into main (f69e8ac) will decrease coverage by 0.30%.
The diff coverage is 87.76%.

@@            Coverage Diff             @@
##             main     #179      +/-   ##
==========================================
- Coverage   91.28%   90.97%   -0.31%     
==========================================
  Files          92      102      +10     
  Lines        2375     2538     +163     
==========================================
+ Hits         2168     2309     +141     
- Misses        207      229      +22     

Impacted Files	Coverage Δ
...xample/Views/Settings/SettingsViewController.swift	0.00% <0.00%> (ø)
...UI/Deprecations/WorkflowLauncherDeprecations.swift	0.00% <0.00%> (ø)
...rent_SwiftUI/ViewModifiers/NavigationWrapper.swift	100.00% <ø> (ø)
...rent_SwiftUI/Protocols/_WorkflowItemProtocol.swift	25.00% <25.00%> (ø)
...Example/Views/Profile/AccountInformationView.swift	79.71% <41.17%> (ø)
...ftUIExample/SwiftUIExample/SwiftUIExampleApp.swift	92.30% <80.00%> (ø)
...ws/Settings/SettingsOnboardingViewController.swift	88.23% <88.23%> (ø)
ExampleApps/SwiftUIExample/Views/ContentView.swift	93.75% <100.00%> (+1.44%)	⬆️
ExampleApps/SwiftUIExample/Views/LoginView.swift	94.33% <100.00%> (ø)
...rrent_SwiftUI/ResultBuilders/WorkflowBuilder.swift	100.00% <100.00%> (ø)
... and 8 more

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[nickkaczmarek]

Left some comments about casing in the docs.

[nickkaczmarek]

Added some UIKit interop code to ensure that we are definitely testing all the bits. I think we're ready to release!