[AltStoreCore] Adds Pledge, PledgeReward, and PledgeTier

Allows us to cache pledges for current user, which can be used to determine if user has access to Patreon-only apps.

AltStoreCore/Model/Patreon/PledgeReward.swift

@@ -0,0 +1,42 @@
+//
+//  PledgeReward.swift
+//  AltStoreCore
+//
+//  Created by Riley Testut on 10/24/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import CoreData
+
+@objc(PledgeReward)
+public class PledgeReward: NSManagedObject, Fetchable
+{
+    /* Properties */
+    @NSManaged public private(set) var name: String
+    @NSManaged public private(set) var identifier: String
+    
+    /* Relationships */
+    @NSManaged public private(set) var pledge: Pledge?
+    
+    private override init(entity: NSEntityDescription, insertInto context: NSManagedObjectContext?)
+    {
+        super.init(entity: entity, insertInto: context)
+    }
+    
+    init(benefit: PatreonAPI.Benefit, context: NSManagedObjectContext)
+    {
+        super.init(entity: PledgeReward.entity(), insertInto: context)
+        
+        self.name = benefit.name
+        self.identifier = benefit.identifier.rawValue
+    }
+}
+
+public extension PledgeReward
+{
+    @nonobjc class func fetchRequest() -> NSFetchRequest<PledgeReward>
+    {
+        return NSFetchRequest<PledgeReward>(entityName: "PledgeReward")
+    }
+}