Implement conditional file watching for terminal commands with chat editing service integration

[Copilot]

This PR implements a system for intelligently detecting file operations in terminal commands and integrating with VS Code's chat editing service to track file changes, without disrupting the normal terminal execution flow.

Problem

Previously, there was no mechanism to track when terminal commands performed file operations that could be relevant to ongoing chat editing sessions. Commands like cat file.txt, mkdir new-dir, or file modifications would execute without any integration with VS Code's editing workflow.

Solution

This implementation provides a non-intrusive monitoring system that:

File Operation Detection

• Command Pattern Recognition: Detects file operations using FileOperationHeuristics class with regex patterns for cat, type, mkdir, ls, and other commands
• File Path Extraction: Handles quoted paths, multiple files, and various command formats
• No Command Interruption: Commands execute normally in the terminal without any re-routing

Chat Editing Service Integration

• Post-execution Analysis: After command completion, analyzes output using regex heuristics to detect actual file changes
• Chat Service Reporting: Reports detected file changes to IChatEditingService for integration with ongoing editing sessions
• URI Resolution: Properly converts relative and absolute file paths to URIs for VS Code integration

Key Features

Enhanced File Change Detection:

// Detects file reading operations
const heuristics = new FileOperationHeuristics();
heuristics.detectCommandType('cat README.md')  // Returns: 'file-read'
heuristics.extractFilePaths('cat "file with spaces.txt" config.json')  // Returns: ['file with spaces.txt', 'config.json']

Post-execution File Change Analysis:

// Analyzes command output for actual file changes
analyzeCommandExecutionForFileChanges('mkdir new-project', 'created directory new-project')
// Returns: { detectedFileChanges: ['new-project'], confidence: 'high' }

Implementation Details

• FileOperationHeuristics: Core class for detecting file operations and extracting file paths
• IChatEditingService Integration: Reports file changes to chat editing sessions
• Conditional Monitoring: Only activates file watching for commands that involve file operations
• Seamless Terminal Experience: Maintains normal terminal workflow without interruptions

Supported Commands

• File Reading: cat file.txt, type config.json (Windows)
• Directory Creation: mkdir new-dir, mkdir -p deep/nested/path
• Future Extensibility: Framework ready for ls, echo >, and other file operations

The system runs terminal commands normally while tracking file changes using regex heuristics and reporting them to the chat editing service for better integration with VS Code's editing workflow.

Fixes #253884.

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[Tyriar]

@copilot Don't try integrate the alternative recommendation feature with this. I don't want it to actually reroute tool calls anymore like I said earlier in the issue, instead it should essentially conditionally enable file watching based on the command and then integrate with the chat editing service to report any file edits.

[Copilot]

I've removed the alternative recommendation integration and implemented the requested approach instead. The changes in commit 29a3850 now:

1. Removed command re-routing: No longer uses getCommandReRoutingRecommendation for actual tool re-routing in prepareToolInvocation
2. Added conditional file watching: Detects file operations using FileOperationHeuristics but only for monitoring purposes
3. Integrated with chat editing service: Added IChatEditingService dependency and _reportFileChangesToChatEditingService method that reports detected file changes to the chat editing service
4. Maintained command execution: Commands run normally in the terminal, and file changes are tracked post-execution using regex heuristics

The system now follows the "run the terminal command and track any files changed" approach as requested, with proper integration to the chat editing service for reporting file edits.