refactor(frontend): interaction layer state

[eatyourgreens]

Build interaction layer state dynamically from the interaction group config. hoverLayerStates is a map of layer IDs to layer hover states and layer hover targets.

const layerStates = useRecoilValue(layerHoverStates);
const { isHovered, target } = layerStates.get('hazards');

Move interaction state from src/lib/data-map/interactions to src/state/interactions.