Initial commit: Biibaye branding extension

- Overrides app name to Biibaye via translations
- Sets window title to Biibaye - Delivery System
- Injects primary color #FF4500 and dark bg #343538
- Replaces favicons with custom assets (placeholder files)
- Includes site.webmanifest with Biibaye config
- Minimal Ember engine to satisfy Fleetbase extension system

addon/engine.js

@@ -0,0 +1,13 @@
+import Engine from '@ember/engine';
+import loadInitializers from 'ember-load-initializers';
+import Resolver from 'ember-resolver';
+import config from './config/environment';
+
+const { modulePrefix } = config;
+
+export default class BiibayeBrandingEngine extends Engine {
+    modulePrefix = modulePrefix;
+    Resolver = Resolver;
+}
+
+loadInitializers(BiibayeBrandingEngine, modulePrefix);