Add Conjugate App Scribe-Server data download functionality

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 #612 where the UI is created.

Once the download UI is finalized in #612, we'll then be ready to add in the download data functionality for Scribe-Conjugate. Ideally this would be using shared functions for the Keyboard and Conjugate apps so that they in sync. Any UI functionality developed here should use Swift UI though.

The big difference for this is that:

• In the keyboard app we want to download all data for a given language
• In the Conjugate app we just want to download the verbs
• As with the keyboard app, in the Conjugate app we should also download the data contracts such that the data can be used in the application in a programmatic way that's determined by the contract

Contribution

Happy to support the work here and review a PR once one is ready! 🚀

Start by reviewing the download UI work in #612 and the existing keyboard-app download functionality, then identify the shared functions and data contracts used by both apps. The work is done when the Conjugate app can download verbs and their contracts for a selected language through the finalized SwiftUI flow.