feat(errors/gerror): add As support (#4002)

errors/gerror/gerror_api_stack.go

@@ -98,6 +98,23 @@ func Is(err, target error) bool {
 	return errors.Is(err, target)
 }
 
+// As finds the first error in err's chain that matches target, and if so, sets
+// target to that error value and returns true.
+//
+// The chain consists of err itself followed by the sequence of errors obtained by
+// repeatedly calling Unwrap.
+//
+// An error matches target if the error's concrete value is assignable to the value
+// pointed to by target, or if the error has a method As(interface{}) bool such that
+// As(target) returns true. In the latter case, the As method is responsible for
+// setting target.
+//
+// As will panic if target is not a non-nil pointer to either a type that implements
+// error, or to any interface type. As returns false if err is nil.
+func As(err error, target any) bool {
+	return errors.As(err, target)
+}
+
 // HasError performs as Is.
 // This function is designed and implemented early before errors.Is of go stdlib.
 // Deprecated: use Is instead.