Native DB + Tauri + Vanilla

This is a simple example of a Tauri app using a native_db.

Key points:

• Define an api: 1 model Person with 2 versions, source main.rs#L10-L43.
• Use native_db as a Tauri managed state, source main.rs#L93-L95.
• Migrate the database during the app setup, source main.rs#L87-L91.