[WIP] Add compilation error report to compile command

[Copilot]

• Understand the codebase and existing compilation error tracking
• Modify CompilationStats to track failed workflows with error counts
• Update printCompilationSummary to display detailed error summary at the end
• Update all places that add to FailedWorkflows to track error counts
• Add/update tests for the new functionality
• Manually test with multiple error scenarios
• Run full test suite to ensure no regressions

Summary

The compile command now provides a list of workflows with compilation errors at the end of execution, showing:

• File path: Full path to each failed workflow
• Error count: Number of errors per workflow (e.g., "1 error" or "3 errors")

Example output:

✗ Compiled 3 workflow(s): 2 error(s), 0 warning(s)
✗ Failed workflows:
  - /tmp/test-compile-errors/error1.md (1 error)
  - /tmp/test-compile-errors/error2.md (1 error)

This makes it easier to identify and fix compilation issues across multiple workflows.

Original prompt

The compile command should provide a list of workflow with compilation error at the end of the execution (file path + number of errors)

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