feat: 添加项目基础文件和依赖管理

新增.gitignore、Podfile和Podfile.lock文件以管理项目依赖，添加README.md文件提供项目简介和安装步骤，创建NIMSessionManager、ClientConfig、LogManager和NetworkManager等管理类以支持网络请求和日志记录功能，更新AppDelegate和ContentView以集成NIM SDK和实现用户登录功能。

yana/Managers/NIMSessionManager.swift

@@ -0,0 +1,127 @@
+import Foundation
+import NIMSDK
+
+// MARK: - 网络状态通知
+extension Notification.Name {
+    static let NIMNetworkStateChanged = Notification.Name("NIMNetworkStateChangedNotification")
+    static let NIMTokenExpired = Notification.Name("NIMTokenExpiredNotification")
+}
+
+@objc
+@objcMembers
+final class NIMSessionManager: NSObject {
+    
+    static let shared = NIMSessionManager()
+    
+    // MARK: - 登录管理
+    func autoLogin(account: String, token: String, completion: @escaping (Error?) -> Void)  {
+        NIMSDK.shared().v2LoginService.add(self)
+        let data = NIMAutoLoginData()
+        data.account = account
+        data.token = token
+        data.forcedMode = false
+        NIMSDK.shared().loginManager.autoLogin(data)
+    }
+    
+    func login(account: String, token: String, completion: @escaping (Error?) -> Void) {
+        NIMSDK.shared().loginManager.login(account, token: token) { error in
+            if error == nil {
+                self.registerObservers()
+            }
+            completion(error)
+        }
+    }
+    
+    func logout() {
+        NIMSDK.shared().loginManager.logout { _ in
+            self.removeObservers()
+        }
+    }
+    
+    // MARK: - 消息监听
+    private func registerObservers() {
+        // 在 autoLogin 方法中
+//        NIMSDK.shared().v2LoginService.add(self as! V2NIMLoginServiceDelegate)
+        
+        // 在 registerObservers 方法中 
+//        NIMSDK.shared().v2LoginService.add(self as! V2NIMLoginServiceDelegate)
+        
+        // 在 removeObservers 方法中
+//        NIMSDK.shared().v2LoginService.remove(self as! V2NIMLoginServiceDelegate)
+        NIMSDK.shared().chatManager.add(self)
+        NIMSDK.shared().loginManager.add(self)
+    }
+    
+    private func removeObservers() {
+        NIMSDK.shared().v2LoginService.remove(self)
+        NIMSDK.shared().chatManager.remove(self)
+        NIMSDK.shared().loginManager.remove(self)
+    }
+}
+
+// MARK: - NIMChatManagerDelegate
+extension NIMSessionManager: NIMChatManagerDelegate {
+    func onRecvMessages(_ messages: [NIMMessage]) {
+        NotificationCenter.default.post(
+            name: .NIMDidReceiveMessage,
+            object: messages
+        )
+    }
+}
+
+// MARK: - NIMLoginManagerDelegate
+extension NIMSessionManager: NIMLoginManagerDelegate {
+    func onLogin(_ step: NIMLoginStep) {
+        NotificationCenter.default.post(
+            name: .NIMLoginStateChanged,
+            object: step
+        )
+    }
+    
+    func onAutoLoginFailed(_ error: Error) {
+        if (error as NSError).code == 302 {
+            NotificationCenter.default.post(name: .NIMTokenExpired, object: nil)
+        }
+    }
+}
+
+// MARK: - 通知定义
+extension Notification.Name {
+    static let NIMDidReceiveMessage = Notification.Name("NIMDidReceiveMessageNotification")
+    static let NIMLoginStateChanged = Notification.Name("NIMLoginStateChangedNotification")
+}
+
+// MARK: - NIMV2LoginServiceDelegate
+extension NIMSessionManager: V2NIMLoginListener  {
+    func onLoginStatus(_ status: V2NIMLoginStatus) {
+        
+    }
+    
+    func onLoginFailed(_ error: V2NIMError) {
+        
+    }
+    
+    func onKickedOffline(_ detail: V2NIMKickedOfflineDetail) {
+        
+    }
+    
+    func onLoginClientChanged(
+        _ change: V2NIMLoginClientChange,
+        clients: [V2NIMLoginClient]?
+    ) {
+        
+    }
+//    @objc func onLoginProcess(step: NIMV2LoginStep) {
+//        NotificationCenter.default.post(
+//            name: .NIMV2LoginStateChanged,
+//            object: step
+//        )
+//    }
+//    
+//    @objc func onKickOut(result: NIMKickOutResult) {
+//        NotificationCenter.default.post(
+//            name: .NIMKickOutNotification,
+//            object: result
+//        )
+//    }
+}