Decouples score definitions from UI implementations by mandating `serde::Serialize` and `serde::Deserialize` for all `Score` structs. UIs will interact with scores via their serialized representation, enabling scalability and reducing complexity for score authors.
This approach:
- Scales better with new score types and UI targets.
- Simplifies score authoring by removing the need for UI-specific display traits.
- Leverages the `serde` ecosystem for robust data handling.
Adding new field types requires updates to all UIs, a trade-off acknowledged in the ADR.
