feat(vessels): render on Navara (WIP: browser parity not yet run)

render/navara.js: one always-on-top engine.movers chevron bank (atlas of
every chevron icon at 32 px), MMSI pick ids, trail on engine.lines,
camera reads through the shared Navara layer view (extracted from the
aircraft renderer to src/layers/shared/render/navaraView.js, + camera
pickEllipsoid and canvas clientWidth). Registered in navaraMode.
QA: vessel qaDrawn; probe selected() falls back to getSelectedInfo;
qa-w1-layers vessel section; qa-vessels-engines side by side; --engine
for qa-vessel-cards/datum; qa-flights-engines military near pose 100 km.
Unit tests on the fake engine pass; browser runs NOT done (see progress).

scripts/package-boundaries.json

@@ -2606,7 +2606,9 @@
       "src/layers/aircraft/qaDrawn.js",
       "src/layers/localAdsb/render/cesium.js",
       "src/layers/vessels/render/cesium.js",
-      "src/layers/localAdsb/render/navara.js"
+      "src/layers/localAdsb/render/navara.js",
+      "src/layers/vessels/render/navara.js",
+      "src/layers/shared/render/navaraView.js"
     ],
     "external": [
       "hls.js",