Cw 973 in app gift card redemption flow plus UI (#2285)

* refactor: cleanup cake_pay folder

* refactor: add My Cards tab on the main screen

* ui: add user card item

* refactor: cakePay purchase flow

* feat: add user card info

* refactor: auth flow

* refactor: theme data

* revert

* Update qr_widget.dart

* fix: update with new themes

* minor fixes

* feat: put redemption flow under a feature flag

* feat: implement simulated purchasing flow in debug mode

* feat: support LTC and MWEB payments

* Update savings_page.dart

* fix: UI fixes

* add Cake Pay transaction sent bottom sheet

* localization

* Update cake_pay_buy_card_page.dart

* addressing review comments

* fix marge conflicts

lib/src/widgets/rounded_checkbox.dart

@@ -0,0 +1,27 @@
+import 'dart:ui';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class RoundedCheckbox extends StatelessWidget {
+  RoundedCheckbox({Key? key, required this.value}) : super(key: key);
+
+  final bool value;
+
+  @override
+  Widget build(BuildContext context) {
+    return  value
+          ? Container(
+              height: 20.0,
+              width: 20.0,
+              decoration: BoxDecoration(
+                borderRadius: BorderRadius.all(Radius.circular(50.0)),
+                color: Theme.of(context).colorScheme.primary,
+              ),
+              child: Icon(
+                Icons.check,
+                color: Theme.of(context).colorScheme.surface,
+                size: 14.0,
+              ))
+          : Offstage();
+  }
+}