Add comprehensive documentation for Tweaks folder functionality

[Copilot]

This PR adds detailed documentation explaining how the Tweaks folder works in Ksign, addressing the request to understand the codebase's tweak injection system.

What's Added

📚 Comprehensive Documentation (TWEAKS_DOCUMENTATION.md)

A complete technical guide covering:

• System Architecture: How tweaks are discovered, processed, and injected
• File Type Support: .dylib, .deb, and .framework handling
• Processing Pipeline: From file import to binary injection
• UI Integration: How the SigningTweaksView manages user interactions
• Security Considerations: Handling of scoped resources and permissions

Key Components Documented

🔧 Core Processing (TweakHandler)

• Automatic tweak discovery from Documents/App/Tweaks/
• Debian package extraction and content processing
• Dynamic library injection using ZsignSwift
• Special handling for CydiaSubstrate.framework

🎨 User Interface (SigningTweaksView)

• Two-section layout: "Added Tweaks" and "Available Tweaks"
• File import with security-scoped resource handling
• Toggle controls for enabling/disabling tweaks
• Swipe-to-delete functionality

📁 File Management

• Directory structure: Documents/App/Tweaks/
• Support for jailbreak standard paths
• File copying and preservation strategies
• Error handling and fallback mechanisms

Workflow Overview

User Import → Tweaks Directory → TweakHandler → Binary Injection → Signed App
     ↓              ↓                ↓              ↓              ↓
File Picker → Copy to Tweaks → Process Files → Modify Paths → Final IPA

Technical Details Covered

• Debian Processing: AR archive extraction and data.tar handling
• Path Modification: Converting hardcoded paths to relative paths
• Injection Methods: Using Zsign.injectDyLib() for binary modification
• Bundle Handling: Processing .bundle files for preference panels
• Error Recovery: Comprehensive fallback strategies

This documentation provides developers and users with a complete understanding of how tweaks flow through the system, from initial file selection to final injection into iOS applications.

Files Modified

• ✅ Added TWEAKS_DOCUMENTATION.md - Complete technical documentation

No code changes were made - this is purely documentation to explain the existing functionality.

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[Nyasami]

funniest thing i ever done