feat: millisecond skip (#869)

* feat: millisecond skip

* fix: formatDuration

* fix: post segment

lib/models/common/sponsor_block/segment_model.dart

@@ -10,11 +10,11 @@ class SegmentModel {
     required this.segmentType,
     required this.segment,
     required this.skipType,
-    this.hasSkipped,
+    this.hasSkipped = false,
   });
   String UUID;
   SegmentType segmentType;
   Pair<int, int> segment;
   SkipType skipType;
-  bool? hasSkipped;
+  bool hasSkipped;
 }