Changes

PR #1365 by ksylvan: Implement Prompt Strategies in Fabric

• Add prompt strategies like Chain of Thought (CoT) with --strategy flag for strategy selection
• Implement --liststrategies command to view available strategies and support applying strategies to system prompts
• Improve README with platform-specific installation instructions and fix web interface documentation link
• Refactor git operations with new githelper package and improve error handling in session management
• Fix YouTube configuration check and handling of the installed strategies directory

Direct commits

• Clipboard operations now work on Mac and PC
• Bump golang.org/x/net from 0.35.0 to 0.36.0 in the go_modules group