feat(cdn): enhance delete with folder support, add sync progress events, and bash() function

- Enhanced cdnDelete to recursively delete folders with per-file tracking and error counts
- Added optional 'json' mode parameter to cdnSyncUpload/cdnSyncDownload for output format control
- Implemented real-time sync event callbacks for progress visualization with colored terminal output
- Added bash() as primary function with exec_cmd() as alias for backward compatibility
- Introduced SyncEvent type for action tracking (uploading/downloaded/skipped/deleted/error)
- Updated function tests to support new mode parameter

pkg/cli/function.go

@@ -453,12 +453,12 @@ func runFunctionList(cmd *cobra.Command, args []string) error {
 // to work the same as "osmedeus eval cdn_ls_tree()"
 func normalizeScriptExpression(expr string) string {
 	expr = strings.TrimSpace(expr)
-	
+
 	// If it already has parentheses, return as-is
 	if strings.Contains(expr, "(") {
 		return expr
 	}
-	
+
 	// Check if it's a known function name
 	allFuncs := functions.AllFunctions()
 	for _, fn := range allFuncs {
@@ -469,7 +469,7 @@ func normalizeScriptExpression(expr string) string {
 			return expr + "()"
 		}
 	}
-	
+
 	// Not a known function, return as-is (could be a variable or expression)
 	return expr
 }