fix(globe): Navara's shadowed sun leaked a light per frame

Navara 0.2.1's transparent pass refreshes its copy of every scene light
each frame with copy(light, true). For the sun's cascaded shadow lights
(three-csm CascadedDirectionalLights) that copy clones every cascade, so
each frame brought new DirectionalLights with new ids and three's
WebGLLights uniforms cache (keyed by id) grew by about 1.2 KB a frame in
the looks whose sun casts shadows (minimal, photoreal).

src/globe/navara/cascadedLightCopy.js patches the copy to update the
cascades it has in place (pose, colour, intensity, target, shadow
settings and camera) when the counts match, and keeps the rebuild
otherwise; internals.js finds the class among the view's scene lights
(private view._scenes.light) and applies it when the globe is built.
Tests on three-csm's own class: the original copy changes the light ids,
the patched one keeps the lights and takes the values.

Post-GC JS heap (CDP HeapProfiler.collectGarbage every 10 s, the app on
?engine=navara rendering continuously at 60 fps): minimal 4.33 → 0.20
MB/min over 70 s and 0.06 MB/min over 180 s; photoreal 4.34 → 0.19
MB/min; cinematic (no shadow) 0.34. Added to the upstream asks.

scripts/format-scope.json

@@ -1080,5 +1080,6 @@
   "src/globe/navara/lines/lineMesh.test.mjs",
   "src/globe/pickDelivery.test.mjs",
   "src/globe/navara/picking.test.mjs",
-  "src/data/selectionDispatcher.test.mjs"
+  "src/data/selectionDispatcher.test.mjs",
+  "src/globe/navara/cascadedLightCopy.test.mjs"
 ]