Initial commit

lib/core/extensions/duration_extensions.dart

@@ -0,0 +1,15 @@
+extension DurationExtensions on Duration {
+  String toMmSs() {
+    final int minutes = inMinutes.remainder(60);
+    final int seconds = inSeconds.remainder(60);
+    return '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
+  }
+}
+
+extension IntTimeExtensions on int {
+  String toMmSs() {
+    final int minutes = this ~/ 60;
+    final int seconds = this % 60;
+    return '$minutes:${seconds.toString().padLeft(2, '0')}';
+  }
+}