Complete compile error summary feature

All tests pass successfully:
- Unit tests verify error tracking and display
- Integration tests confirm proper behavior
- Linting and formatting pass
- Manual testing shows correct output format

Feature now displays failed workflows with:
- Full file path for easy identification
- Error count per workflow (with proper singular/plural)
- Clean, readable format at end of compilation

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

pkg/cli/compile_helpers.go

@@ -402,7 +402,7 @@ func handleFileDeleted(mdFile string, verbose bool) {
 func trackWorkflowFailure(stats *CompilationStats, workflowPath string, errorCount int) {
 	// Add to FailedWorkflows for backward compatibility
 	stats.FailedWorkflows = append(stats.FailedWorkflows, filepath.Base(workflowPath))
-	
+
 	// Add detailed failure information
 	stats.FailureDetails = append(stats.FailureDetails, WorkflowFailure{
 		Path:       workflowPath,