[v1.1] Homescreen Shortcuts allow quick sharing

[patrickd-]

Expected task duration: 2 hours
Reward for accepted PR: US$50

Summary

By implementing shortcuts, which are kind of a mixture between widget and app-launch-icons, we can allow user to add the app's sharing buttons directly to their home screen.

Implementation Instructions

We find an example of what "Shortcuts" are when looking at the list of widgets we can add to our homescreen. In case of GrapheneOS we can specifically find the Contacts app allowing to create shortcuts on the homescreen to directly interact with a specific contact.

The IPS app should similarly offer shortcuts to each of its sharing buttons ("Share File", "Share Clipboard", and possibly "Share Contact" once that is implemented).