Improve loading speed of desktop app (#4865)

# Description of Changes
Improve loading speed of desktop app by loading a default config until
the backend has spawned.

frontend/src/core/hooks/useBackendHealth.ts

@@ -0,0 +1,12 @@
+import type { BackendHealthState } from '@app/types/backendHealth';
+
+export function useBackendHealth(): BackendHealthState {
+  return {
+    status: 'healthy',
+    message: null,
+    isChecking: false,
+    lastChecked: Date.now(),
+    error: null,
+    isHealthy: true,
+  };
+}