feat(fires): MODIS in Active Fires and a Fire Perimeters layer (#737)

Adds MODIS NRT to Active Fires and a keyless Fire Perimeters layer (NIFC WFIGS) with
InciWeb incident links, served through a capped, cached /api/fire-perimeters proxy.

Co-authored-by: Gustavo Beneduzi <[email protected]>
Co-authored-by: James Cooke <[email protected]>

src/sources/reference.js

@@ -1,10 +1,12 @@
 import { createUsgsEarthquakeSource } from '../layers/earthquakes/source.js';
+import { createWfigsPerimeterSource } from '../layers/perimeters/source.js';
 import { createBundledCableSource } from '../layers/submarineCables/bundledSource.js';
 
 /** Construct the existing reference feeds independently of application setup. */
 export function createReferenceSources() {
   return {
     earthquakes: createUsgsEarthquakeSource(),
+    'fire-perimeters': createWfigsPerimeterSource(),
     cables: createBundledCableSource(),
   };
 }