feat(mapillary): street-level layer core — coverage, sequences, viewer bridge, query engine

Camera-driven Mapillary coverage (z0–5 overview points from orbit, z11–14
ground-clamped sequence lines below 60 km), per-sequence image cones, an
embedded MapillaryJS viewer bridge with a camera-follow mode, sprite icons
for map features, and a query engine that turns a plan into a streamed
z14 tile fan-out. Registers an on-globe CC BY-SA 4.0 credit while enabled.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

src/app/layers/mapillary.js

@@ -0,0 +1,19 @@
+import { createMapillaryLayer } from '../../layers/mapillary/index.js';
+import * as sprites from '../../data/spriteOrder.js';
+import * as picking from '../../data/pickRegistry.js';
+import * as input from '../../data/inputOwnership.js';
+import * as render from '../../renderGovernor.js';
+
+/** Construct the Mapillary layer using the application scene owners and a supplied source. */
+export function createApplicationMapillary({ surface, source }) {
+  return createMapillaryLayer({
+    source,
+    services: {
+      sprites,
+      picking,
+      input,
+      render,
+      ground: surface?.groundFloor ?? null,
+    },
+  });
+}