fix: score-picker uses deep import path instead of elements barrel

In `src/elements/score-picker/score-picker.tsx:1`:

```ts
// current
import { TileRow } from "src/elements/tile-row/tile-row";

// should match every other consumer in the codebase
import { TileRow } from "elements";
```

All other consumers (`step-class`, `step-origin`, `origin-bonus-picker`, `elements-showcase`) import via the barrel. This one bypasses it inconsistently.