Add config file support to CLI parser

Add -f/--config-file flag for loading YAML configs from local or remote sources. Fix error handling to return unmatched errors.

pkg/utils/error.go

@@ -55,7 +55,7 @@ func HandleError(err error, matchers ...ErrorMatcher) (bool, error) {
 		}
 	}
 
-	return false, nil // No matcher found
+	return false, err // No matcher found
 }
 
 // HandleErrorOrDie processes an error against a list of matchers and executes the appropriate handler.