[log] Add debug logging to utility and validation functions

[github-actions]

Summary

Enhanced 5 Go files with debug logging to improve troubleshooting and development:

1. pkg/gitutil/gitutil.go - Added logging for authentication error detection
2. pkg/repoutil/repoutil.go - Added logging for GitHub URL parsing and repository slug splitting
3. pkg/cli/validators.go - Added logging for workflow name and intent validation
4. pkg/workflow/github_tool_to_toolset.go - Added logging for GitHub tool validation against toolsets
5. pkg/workflow/prompts.go - Added logging for comment-related trigger detection and Playwright tool checks

Changes Made

Each file received:

• Logger declaration using the project's logger package
• Meaningful debug logging at key decision points
• Function entry logging with parameters
• Success/failure outcome logging

All logging follows the project guidelines from AGENTS.md:

• Used pkg:filename naming convention
• No side effects in logger arguments
• Focused on helpful debugging information
• Log levels appropriate for debug tracing

Validation

• ✅ Build completed successfully (make build)
• ✅ Unit tests pass for affected packages
• ✅ Compile command works correctly
• ✅ No breaking changes to functionality

Notes

These logging additions will help developers debug issues related to:

• GitHub URL parsing and repository identification
• Workflow name and intent validation errors
• Authentication error detection
• GitHub tool configuration validation
• Workflow trigger detection logic

Debug logs can be viewed by setting DEBUG=* environment variable when running gh-aw commands.

🤖 Generated with [Claude Code]((redacted)

AI generated by Go Logger Enhancement

[pelikhan]

@copilot format, lint

[Copilot]

@pelikhan I've opened a new pull request, #12197, to work on those changes. Once the pull request is ready, I'll request review from you.