Implemented multi select interaction (#13)

mobile/lib/modules/home/ui/monthly_title_text.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+class MonthlyTitleText extends StatelessWidget {
+  const MonthlyTitleText({
+    Key? key,
+    required this.isoDate,
+  }) : super(key: key);
+
+  final String isoDate;
+
+  @override
+  Widget build(BuildContext context) {
+    var monthTitleText = DateFormat('MMMM y').format(DateTime.parse(isoDate));
+
+    return SliverToBoxAdapter(
+      child: Padding(
+        padding: const EdgeInsets.only(left: 12.0, top: 32),
+        child: Text(
+          monthTitleText,
+          style: TextStyle(
+            fontSize: 26,
+            fontWeight: FontWeight.bold,
+            color: Theme.of(context).primaryColor,
+          ),
+        ),
+      ),
+    );
+  }
+}