gateway: feature request: ability to disable directory listings

tldr; I would like one more option to support blocking listing directory contents

### Checklist

- [X] My issue is specific & actionable.
- [X] I am not suggesting a protocol enhancement.
- [X] I have searched on the [issue tracker](https://github.com/ipfs/kubo/issues?q=is%3Aissue) for my issue.

### Description

https://ipfs.io/ipfs/Qmd148AbtEZKR4KCUZiNGDURTxCwSa13adLKkjdmyWPMt9 【let him redirect】
https://ipfs.io/ipfs/Qmd148AbtEZKR4KCUZiNGDURTxCwSa13adLKkjdmyWPMt9/VCG211be3c9c31.jpg 【OK】
https://ipfs.io/ipfs/QmcBpxUZMbD5iwNA8w2dj8QBWvTdAXwNDHbZ74ffqGtNHh 　【OK】

Because certain scenarios have relatively strict security requirements, directory traversal caused by direct get access is considered a security issue. Therefore, it is recommended to directly redirect to the specified page when accessing indirect data resources, instead of directly using the form of directory traversal, or Add a parameter directly in the configuration file to achieve.