Refactor storage model to work with native Realm

ios/App/Shared/models/server/Chapter.swift

@@ -0,0 +1,41 @@
+//
+//  Chapter.swift
+//  App
+//
+//  Created by Ron Heft on 8/16/22.
+//
+
+import Foundation
+import RealmSwift
+
+class Chapter: EmbeddedObject, Codable {
+    @Persisted var id: Int = 0
+    @Persisted var start: Double = 0
+    @Persisted var end: Double = 0
+    @Persisted var title: String?
+    
+    private enum CodingKeys : String, CodingKey {
+        case id, start, end, title
+    }
+    
+    override init() {
+        super.init()
+    }
+    
+    required init(from decoder: Decoder) throws {
+        super.init()
+        let values = try decoder.container(keyedBy: CodingKeys.self)
+        id = try values.decode(Int.self, forKey: .id)
+        start = try values.decode(Double.self, forKey: .start)
+        end = try values.decode(Double.self, forKey: .end)
+        title = try? values.decode(String.self, forKey: .title)
+    }
+    
+    func encode(to encoder: Encoder) throws {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(id, forKey: .id)
+        try container.encode(start, forKey: .start)
+        try container.encode(end, forKey: .end)
+        try container.encode(title, forKey: .title)
+    }
+}