feat(layers): add FAA drone restrictions airspace layer

Show US prohibited and restricted special-use airspace from the keyless
FAA SUA FeatureServer as an off-by-default Infrastructure layer, with
share-link token 3 and an informational-only disclaimer.

server/providers/local.js

@@ -24,6 +24,7 @@ import { mapillaryProxy } from './mapillary.js';
 import { keySetupEndpoint } from '../standalone/key-setup.js';
 import { weatherProxy } from './weather.js';
 import { firePerimetersProxy } from './firePerimeters.js';
+import { droneAirspaceProxy } from './droneAirspace.js';
 import { cycloneProxy } from './cyclones.js';
 import { windProxy } from './wind.js';
 
@@ -60,6 +61,7 @@ function localProviderPlugins({ realtime } = {}) {
     cycloneProxy(),
     mapillaryProxy(),
     firePerimetersProxy(),
+    droneAirspaceProxy(),
     keySetupEndpoint(),
   ];
 }