[iOS] Migrate database location

[euharrison]

On iOS, for security reasons, this PR from Async Storage moved the folder where the file is saved
react-native-async-storage/async-storage#274

It's an idea to move the watermelon.db file to Application Folder for the same reason

[stale]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.