[AltServer] Updates AltPlugin separately from AltServer

Code written and committed with Lil’ Dude “Weedles” by my side <3

AltServer/Plugin/PluginVersion.swift

@@ -0,0 +1,37 @@
+//
+//  PluginVersion.swift
+//  AltServer
+//
+//  Created by Riley Testut and Weedles on 2/15/22 <3
+//  Copyright © 2022 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+struct PluginVersion: Decodable
+{
+    var url: URL
+    var sha256Hash: String
+    var version: String
+    
+    static let v1_0 = PluginVersion(url: URL(string: "https://f000.backblazeb2.com/file/altstore/altserver/altplugin/1_0.zip")!,
+                                      sha256Hash: "070e9b7e1f74e7a6474d36253ab5a3623ff93892acc9e1043c3581f2ded12200",
+                                      version: "1.0")
+    
+    static let v1_9 = PluginVersion(url: Bundle.main.url(forResource: "AltPlugin", withExtension: "zip")!,
+                                       sha256Hash: "83ead26d8776ef6850e06fe3d1c5c5559aca284718b1cf3cc49785ba6b1e2849",
+                                       version: "1.9")
+    
+    private enum CodingKeys: String, CodingKey
+    {
+        case url
+        case sha256Hash = "sha256"
+        case version
+    }
+}
+
+struct PluginVersionResponse: Decodable
+{
+    var version: Int
+    var pluginVersion: PluginVersion
+}