Split out libraries into SPM packages (#298)

Sources/SecretAgent/AppDelegate.swift

@@ -0,0 +1,44 @@
+import Cocoa
+import OSLog
+import Combine
+import SecretKit
+import SecureEnclaveSecretKit
+import SmartCardSecretKit
+import SecretAgentKit
+import Brief
+
+@NSApplicationMain
+class AppDelegate: NSObject, NSApplicationDelegate {
+
+    private let storeList: SecretStoreList = {
+        let list = SecretStoreList()
+        list.add(store: SecureEnclave.Store())
+        list.add(store: SmartCard.Store())
+        return list
+    }()
+    private let updater = Updater(checkOnLaunch: false)
+    private let notifier = Notifier()
+    private lazy var agent: Agent = {
+        Agent(storeList: storeList, witness: notifier)
+    }()
+    private lazy var socketController: SocketController = {
+        let path = (NSHomeDirectory() as NSString).appendingPathComponent("socket.ssh") as String
+        return SocketController(path: path)
+    }()
+    private var updateSink: AnyCancellable?
+
+    func applicationDidFinishLaunching(_ aNotification: Notification) {
+        Logger().debug("SecretAgent finished launching")
+        DispatchQueue.main.async {
+            self.socketController.handler = self.agent.handle(reader:writer:)
+        }
+        notifier.prompt()
+        updateSink = updater.$update.sink { update in
+            guard let update = update else { return }
+            self.notifier.notify(update: update, ignore: self.updater.ignore(release:))
+        }
+    }
+
+
+}
+