Refactor app orchestrator into Application with dependency injection

js/bootstrap.js

@@ -0,0 +1,23 @@
+// js/bootstrap.js
+
+import Application from "./app.js";
+import nostrService from "./services/nostrService.js";
+import r2Service from "./services/r2Service.js";
+import { loadView } from "./viewManager.js";
+import { setApplication, setApplicationReady } from "./applicationContext.js";
+
+const app = new Application({
+  services: {
+    nostrService,
+    r2Service,
+  },
+  loadView,
+});
+
+setApplication(app);
+
+const appReady = app.init();
+setApplicationReady(appReady);
+
+export { app, appReady };
+export default app;