Add frontend folder & setup frontend project

frontend/allowance-planner-v2/src/app/allowance/allowance.page.ts

@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-allowance',
+  templateUrl: 'allowance.page.html',
+  styleUrls: ['allowance.page.scss'],
+  standalone: false,
+})
+export class AllowancePage {
+
+  constructor() {}
+
+}