Replace Google Maps with Esri (ArcGIS) basemaps

Swaps the map provider behind the existing provider-neutral JobMapProps
interface: EsriJobMap.tsx (ArcGIS Maps SDK) replaces GoogleJobMap.tsx,
loaded via esri-loader's CDN script rather than bundled through webpack —
next dev's inline source-mapping of a library this size was OOM-killing
the whole host on first compile. Also fixes a bug in the fit-bounds camera
call: view.goTo() needs real Graphic/Geometry instances, not plain point
literals, so the map was never zooming to the plotted points.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/package.json

@@ -9,13 +9,13 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "@vis.gl/react-google-maps": "^1.4.0",
+    "esri-loader": "^3.7.0",
     "next": "14.2.5",
     "react": "18.3.0",
     "react-dom": "18.3.0"
   },
   "devDependencies": {
-    "@types/google.maps": "^3.58.1",
+    "@arcgis/core": "^4.31.0",
     "@types/node": "^20.11.0",
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",