Convert Keyboard app Settings tab to Swift UI

Terms

• I have searched open and closed feature requests
• I agree to follow Scribe-iOS' Code of Conduct

Description

[!NOTE]

• This issue is blocked by #609 where the new version will be made that this work can be based off of

Once #609 is finished, it would be great if we converted the Settings tab of the Scribe keyboard app over to using Swift UI. This should roughly follow the code that's developed in #609, with minor changes for some of the menu options for the keyboard app. The Figma designs for the keyboard Settings tab can be seen here. Note that for the Settings tab we also need to recreate all of the sub-menus, so this issue is quite large.

Contribution

Happy to support the work here and review a PR! 🚀