Comments (fixes #4)

Model/Comment.swift

@@ -0,0 +1,16 @@
+struct Comment: Identifiable, Equatable {
+    let id: String
+    let author: String
+    let authorAvatarURL: String
+    let time: String
+    let pinned: Bool
+    let hearted: Bool
+    var likeCount: Int
+    let text: String
+    let repliesPage: String?
+    let channel: Channel
+
+    var hasReplies: Bool {
+        !(repliesPage?.isEmpty ?? true)
+    }
+}