Implement SponsorBlock API

Model/SponsorBlockSegment.swift

@@ -0,0 +1,24 @@
+import Foundation
+import SwiftyJSON
+
+final class SponsorBlockSegment: Segment {
+    init(_ json: JSON) {
+        super.init(
+            category: json["category"].string!,
+            segment: json["segment"].array!.map { $0.double! },
+            uuid: json["UUID"].string!,
+            videoDuration: json["videoDuration"].int!
+        )
+    }
+
+    override func title() -> String {
+        switch category {
+        case "selfpromo":
+            return "self-promotion"
+        case "music_offtopic":
+            return "to music"
+        default:
+            return category
+        }
+    }
+}