GitHub integration and enhanced authentication system

New Aiko release v0.0.6

This release adds powerful GitHub integration and introduces flexible authentication options for proxy applications using Bearer tokens. We've also improved the user experience with better validation and visual feedback.

🐙 GitHub Integration

• Added comprehensive GitHub module with full repository management
• GitHub token validation before application startup
• Sample tools and workflows for GitHub operations

🔐 Enhanced Authentication

• Support for non-OAuth proxy apps with header authentication
• Improved header handling and application loading

🎨 User Experience

• Added save feedback to application configurations
• Better visual confirmation for user actions

🔧 Technical Improvements

• Enhanced application loading performance
• Streamlined authentication flow for different app types