Create swift package

Sources/SideStoreCore/Protocols/AppProtocol.swift

@@ -0,0 +1,46 @@
+//
+//  AppProtocol.swift
+//  AltStore
+//
+//  Created by Riley Testut on 7/26/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import AltSign
+import Foundation
+
+public protocol AppProtocol {
+    var name: String { get }
+    var bundleIdentifier: String { get }
+    var url: URL? { get }
+}
+
+public struct AnyApp: AppProtocol {
+    public var name: String
+    public var bundleIdentifier: String
+    public var url: URL?
+
+    public init(name: String, bundleIdentifier: String, url: URL?) {
+        self.name = name
+        self.bundleIdentifier = bundleIdentifier
+        self.url = url
+    }
+}
+
+extension ALTApplication: AppProtocol {
+    public var url: URL? {
+        fileURL
+    }
+}
+
+extension StoreApp: AppProtocol {
+    public var url: URL? {
+        downloadURL
+    }
+}
+
+extension InstalledApp: AppProtocol {
+    public var url: URL? {
+        fileURL
+    }
+}