Update OnboardingView DocC - Version 2 With Signed Commits

[akanshyabhat]

Update OnboardingView DocC - Version 2 With Signed Commits

:recycle: Current situation & Problem

I noticed that the documentation for the initializers and overall descriptions of this screen were a bit unclear vague when I was trying to use them.

All of these changes were copied over from my previous pull request for signed commits.

:gear: Release Notes

N/A

:books: Documentation

• I added documentation to provide a coding example of the initializer of OnboardingView, as well as a more detailed explanation.
• Also added an example fo the custom initializer

:white_check_mark: Testing

Please ensure that the PR meets the testing requirements set by CodeCov and that new functionality is appropriately tested. This section describes important information about the tests and why some elements might not be testable.

:pencil: Code of Conduct & Contributing Guidelines

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[akanshyabhat]

@philippzagar - Here is my updated pull request! I am unable to request a review from you, but if you would be able to review it that would be great! I have copied over all of the changes that we discussed in the previous PR that had been approved with no other differences.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 76.75%. Comparing base (4971a82) to head (de8aa79).

Additional details and impacted files

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