refactor: Fix macOS standalone application

HelperService/WorkingDirectoryManager.swift

@@ -0,0 +1,42 @@
+import Foundation
+import Library
+
+enum WorkingDirectoryManager {
+    private static var workingDirectoryPath: String {
+        "/var/root/Library/Containers/\(AppConfiguration.systemExtensionBundleID)/Data/Working"
+    }
+
+    static func getSize() -> Int64 {
+        let path = workingDirectoryPath
+        guard FileManager.default.fileExists(atPath: path) else {
+            return 0
+        }
+
+        var totalSize: Int64 = 0
+        let enumerator = FileManager.default.enumerator(atPath: path)
+
+        while let file = enumerator?.nextObject() as? String {
+            let filePath = (path as NSString).appendingPathComponent(file)
+            if let attrs = try? FileManager.default.attributesOfItem(atPath: filePath),
+               let size = attrs[.size] as? Int64
+            {
+                totalSize += size
+            }
+        }
+
+        return totalSize
+    }
+
+    static func clean() throws {
+        let path = workingDirectoryPath
+        guard FileManager.default.fileExists(atPath: path) else {
+            return
+        }
+
+        let contents = try FileManager.default.contentsOfDirectory(atPath: path)
+        for item in contents {
+            let itemPath = (path as NSString).appendingPathComponent(item)
+            try FileManager.default.removeItem(atPath: itemPath)
+        }
+    }
+}