Define the Connection interface that abstracts file operations, command execution, and tmux management for both local and remote (SSH) contexts. Includes: - Connection interface with file, exec, and tmux operations - FileInfo interface for remote stat results - BasicFileInfo implementation with JSON serialization - Error types for connection failures This enables Gas Town to manage rigs on remote machines using the same interface as local operations. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>