fix: args issue in __init__ of App class (#3140)

[nautics889]

Remove passing *args to base __init__() in App.
Remove *args from signature.

Details in related issue.

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• (fix): remove '*args' from 'init()' method of 'App', update docstrings and .pyi accordingly

All Submissions:

• Have you followed the guidelines stated in CONTRIBUTING.md file?
• Have you checked to ensure there aren't any other open Pull Requests for the desired changed?

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• This change requires a documentation update

New Feature Submission:

• Does your submission pass the tests?
• Have you linted your code locally prior to submission?

Changes To Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

[masenf]

Thanks for your contribution. This makes sense to me.

[nautics889]

@masenf

And thanks to you for making such a great framework!