refactor: own application request operations and surface caches

src/data/surfaceServices.js

@@ -0,0 +1,13 @@
+import * as terrain from './terrainHeights.js';
+import * as groundFloor from './groundFloor.js';
+import * as meshFloor from './meshFloorSampler.js';
+import * as groundSnap from './groundSnap.js';
+import * as anchors from './fireAnchors.js';
+/** Default scene services for direct data-module compatibility callers. */
+export const defaultSurface = Object.freeze({
+  terrain,
+  groundFloor,
+  meshFloor,
+  groundSnap,
+  anchors,
+});