[FR] Adding config for code block

[Moyf]

I saw in the plugin settings that we can set many options, including whether to display the title, the level of display, and so on... But these settings are global, and I'm wondering if it's possible to add additional settings in the Codeblock that only apply to this specific Block?

---

For example:

```folder-index-content
heading-limit: 3
disable-headings: true
sort-files: alphabetically
subfolder-limit: -1
```

When writing like this, these options would apply specifically to this rendering block.

This way, we can achieve better preview effects for different folder levels! For example, for particularly complex folders, we can individually restrict the hiding of certain content to avoid excessive information.