[ADD] LocalConsole showing STDOUT and STDERR

AltStore/Manager/OutputCapturer.swift

@@ -0,0 +1,49 @@
+//
+//  OutputCapturer.swift
+//  SideStore
+//
+//  Created by Fabian Thies on 12.02.23.
+//  Copyright © 2023 SideStore. All rights reserved.
+//
+
+import Foundation
+import LocalConsole
+
+class OutputCapturer {
+    
+    public static let shared = OutputCapturer()
+
+    private let consoleManager = LCManager.shared
+
+    private var inputPipe = Pipe()
+    private var errorPipe = Pipe()
+    
+    private init() {
+        // Setup pipe file handlers
+        self.inputPipe.fileHandleForReading.readabilityHandler = { [weak self] fileHandle in
+            self?.handle(data: fileHandle.availableData)
+        }
+        self.errorPipe.fileHandleForReading.readabilityHandler = { [weak self] fileHandle in
+            self?.handle(data: fileHandle.availableData, isError: true)
+        }
+
+        // Intercept STDOUT and STDERR
+        dup2(self.inputPipe.fileHandleForWriting.fileDescriptor, STDOUT_FILENO)
+        dup2(self.errorPipe.fileHandleForWriting.fileDescriptor, STDERR_FILENO)
+    }
+
+    deinit {
+        try? self.inputPipe.fileHandleForReading.close()
+        try? self.errorPipe.fileHandleForReading.close()
+    }
+
+    private func handle(data: Data, isError: Bool = false) {
+        guard let string = String(data: data, encoding: .utf8) else {
+            return
+        }
+
+        DispatchQueue.main.async {
+            self.consoleManager.print(string)
+        }
+    }
+}