Adds “Disable Response Caching” debug setting

When enabled, AltStore will ignore cached responses for certain requests and will always make a new request to the server. This is useful for development when repeatedly testing changes to remote files.

Limited to UpdateKnownSourcesOperation for now, but will eventually affect fetching sources as well.

AltStore/Settings/SettingsViewController.swift

@@ -74,6 +74,7 @@ extension SettingsViewController
         case anisetteServers
         case advancedSettings
     
+        case responseCaching
     }
 }
 
@@ -96,6 +97,7 @@ final class SettingsViewController: UITableViewController
     
     @IBOutlet private var refreshSideJITServer: UILabel!
     @IBOutlet private var enforceThreeAppLimitSwitch: UISwitch!
+    @IBOutlet private var disableResponseCachingSwitch: UISwitch!
     
     @IBOutlet private var versionLabel: UILabel!
     
@@ -217,6 +219,7 @@ private extension SettingsViewController
         self.noIdleTimeoutSwitch.isOn = UserDefaults.standard.isIdleTimeoutDisableEnabled
         self.disableAppLimitSwitch.isOn = UserDefaults.standard.isAppLimitDisabled
         self.enforceThreeAppLimitSwitch.isOn = !UserDefaults.standard.ignoreActiveAppsLimit
+        self.disableResponseCachingSwitch.isOn = UserDefaults.standard.responseCachingDisabled
         
         if self.isViewLoaded
         {
@@ -400,6 +403,11 @@ private extension SettingsViewController
         }
     }
     
+    @IBAction func toggleDisableResponseCaching(_ sender: UISwitch)
+    {
+        UserDefaults.standard.responseCachingDisabled = sender.isOn
+    }
+    
     @IBAction func addRefreshAppsShortcut()
     {
         guard let shortcut = INShortcut(intent: INInteraction.refreshAllApps().intent) else { return }
@@ -866,7 +874,7 @@ extension SettingsViewController
                 } else {
                     ELOG("UIApplication.openSettingsURLString invalid")
                 }
-            case .refreshAttempts, .errorLog: break
+            case .refreshAttempts, .errorLog, .responseCaching: break
 
             }