Add frontend folder & setup frontend project

frontend/allowance-planner-v2/capacitor.config.ts

@@ -0,0 +1,9 @@
+import type { CapacitorConfig } from '@capacitor/cli';
+
+const config: CapacitorConfig = {
+  appId: 'io.ionic.starter',
+  appName: 'allowance-planner-v2',
+  webDir: 'www'
+};
+
+export default config;