feat: import native road packages from ZIP

config/examples/template.json

@@ -1,6 +1,7 @@
 {
   "id": "my-area",
   "input": "/absolute/path/to/input.osm",
+  "nativeRoadPackage": "/absolute/path/to/exported-native-road-package.zip",
   "outputRoot": "/absolute/path/to/outputs",
   "qgisApp": "/Applications/QGIS.app",
   "blenderApp": "/Applications/Blender.app",
@@ -24,14 +25,6 @@
   "turnLaneArrows": {
     "enabled": false
   },
-  "nativeRoad": {
-    "edgeLines": false,
-    "junctionTemplates": {
-      "enabled": false,
-      "references": [],
-      "clusters": []
-    }
-  },
   "osm2streets": {
     "debug_each_step": false,
     "dual_carriageway_experiment": false,